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Istimsak Abdulbasir

Istimsak Abdulbasir

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  • Istimsak Abdulbasir
    RE: Hello!
    There are tons of Linux related resources available. So much, it could sink a battle ship, figure of speech. Well to start, be specific on what aspect of Linux you want to learn; linux administration, linux networking, kernel development, development, cloud computing, etc. Use that to collect materials on those aspects. [b]Documentations and howTo's are good sources[/b] Start here: [url=http://www.linux.com/learn/]Learn linux[/url]
    Link to this post 09 Dec

    There are tons of Linux related resources available. So much, it could sink a battle ship, figure of speech.

    Well to start, be specific on what aspect of Linux you want to learn; linux administration, linux networking, kernel development, development, cloud computing, etc. Use that to collect materials on those aspects.

    Documentations and howTo's are good sources

    Start here:

    Learn linux

  • Istimsak Abdulbasir
    RE: Bootable DVD and Switchign to Linux Help
    Let us know how things worked out for you.
    Link to this post 09 Dec

    Let us know how things worked out for you.

  • Istimsak Abdulbasir
    RE: Linux on Chromebook
    I have never installed Linux on a chromebook. Never had a chromebook. Not yet however :-) Here are a few sites that demonstrates how to install Linux on a chromebook. Perhaps there is something in these tutorials that can help you. [url=http://www.linux.com/learn/tutorials/795730-how-to-easily-install-ubuntu-on-chromebook-with-crouton]Installing Linux in a chromebook using croutun[/url] [url=http://www.howtogeek.com/162120/how-to-install-ubuntu-linux-on-your-chromebook-with-crouton/]How to install ubuntu Linux on your chromebook[/url] This might be interesting for you to read. I learned that if you enable OS verification(disabling developer mode), you will reset your chromebook erasing what you previously did. [b]Removing Crouton and Restoring Your Chromebook[/b] "If you decide you’re done with Linux, you can easily get rid of the scary boot screen and get your internal storage space back. Just reboot your Chromebook normally to get back to the scary warning screen at boot-up. Follow the prompts on your screen (tap the Space bar and then press Enter) to disable Developer Mode. When you disable Developer Mode, your Chromebook will clean everything up, restoring you to a clean, safe locked-down Chrome OS system and overwriting all the changes you’ve made to your Chromebook’s software." (HowToGeek) [b]Enable developer mode[/b] "In order to install your own operating system on Chromebooks, you have to enable the developer mode. It’s extremely easy to do and is very well documented by Google. The latest Chromebooks use a combination of keys to enter the developer mode, whereas older devices have a physical switch. Different devices have different locations for the switch, so please Google your device to find the location of the switch and flip it. If you are on the latest Chromebook then you can enable the developer mode by holding Esc + Refresh keys and then push the ‘power’ button. The recovery screen will show a scary warning. Just ignore it and let Chrome OS wipe your data. The process can take up to 15 minutes, so don’t turn off your Chromebook. Also keep in mind that once Chrome OS is reinstalled you will continue to see this warning every time you boot your system, as long as the developer mode is enabled. However, it won’t wipe the data every time. You can simply hit Ctrl+d to quickly boot into Chrome OS (don’t do it this time while Chrome OS is preparing your system for developer mode)." (Swapnil Bhartiya)
    Link to this post 09 Dec

    I have never installed Linux on a chromebook. Never had a chromebook. Not yet however :-) Here are a few sites that demonstrates how to install Linux on a chromebook. Perhaps there is something in these tutorials that can help you.

    Installing Linux in a chromebook using croutun

    How to install ubuntu Linux on your chromebook


    This might be interesting for you to read. I learned that if you enable OS verification(disabling developer mode), you will reset your chromebook erasing what you previously did.

    Removing Crouton and Restoring Your Chromebook
    "If you decide you’re done with Linux, you can easily get rid of the scary boot screen and get your internal storage space back.

    Just reboot your Chromebook normally to get back to the scary warning screen at boot-up. Follow the prompts on your screen (tap the Space bar and then press Enter) to disable Developer Mode. When you disable Developer Mode, your Chromebook will clean everything up, restoring you to a clean, safe locked-down Chrome OS system and overwriting all the changes you’ve made to your Chromebook’s software." (HowToGeek)


    Enable developer mode
    "In order to install your own operating system on Chromebooks, you have to enable the developer mode. It’s extremely easy to do and is very well documented by Google. The latest Chromebooks use a combination of keys to enter the developer mode, whereas older devices have a physical switch. Different devices have different locations for the switch, so please Google your device to find the location of the switch and flip it. If you are on the latest Chromebook then you can enable the developer mode by holding Esc + Refresh keys and then push the ‘power’ button. The recovery screen will show a scary warning. Just ignore it and let Chrome OS wipe your data. The process can take up to 15 minutes, so don’t turn off your Chromebook.

    Also keep in mind that once Chrome OS is reinstalled you will continue to see this warning every time you boot your system, as long as the developer mode is enabled. However, it won’t wipe the data every time. You can simply hit Ctrl+d to quickly boot into Chrome OS (don’t do it this time while Chrome OS is preparing your system for developer mode)." (Swapnil Bhartiya)

  • Istimsak Abdulbasir
    RE: Just tried to install Ubuntu and now I'm livid.
    Perhaps the city Montreal is part of a time zone region. You may have to select the region to get the correct time. What region are you in? Example of Time Zone Regions: [code]1) Newfoundland Time, including SE Labrador 2) Atlantic Time - Nova Scotia (most places), PEI 3) Atlantic Time - Nova Scotia - places that did not observe DST 1966-1971 4) Atlantic Time - New Brunswick 5) Atlantic Time - Labrador - most locations 6) Atlantic Standard Time - Quebec - Lower North Shore 7) Eastern Time - Ontario & Quebec - most locations 8) Eastern Time - Ontario & Quebec - places that did not observe DST 1967-1973 9) Eastern Time - Thunder Bay, Ontario 10) Eastern Time - east Nunavut - most locations 11) Eastern Time - Pangnirtung, Nunavut 12) Central Time - Resolute, Nunavut 13) Eastern Standard Time - Atikokan, Ontario and Southampton I, Nunavut 14) Central Time - central Nunavut 15) Central Time - Manitoba & west Ontario 16) Central Time - Rainy River & Fort Frances, Ontario 17) Central Standard Time - Saskatchewan - most locations 18) Central Standard Time - Saskatchewan - midwest 19) Mountain Time - Alberta, east British Columbia & west Saskatchewan 20) Mountain Time - west Nunavut 21) Mountain Time - central Northwest Territories 22) Mountain Time - west Northwest Territories 23) Mountain Standard Time - Creston, British Columbia 24) Mountain Standard Time - Dawson Creek & Fort Saint John, British Columbia 25) Pacific Time - west British Columbia 26) Pacific Time - south Yukon 27) Pacific Time - north Yukon[/code] Ubuntu supports hundreds of languages which would mean it supports the majority of time zones if not all. Discover the time zones ubuntu supports or supported time Zone regions. Then determine that time zone region Montreal is located in. [url=http://manpages.ubuntu.com/manpages/utopic/man1/tzselect.1.html]Selecting Time Zones in Ubuntu[/url]
    Link to this post 09 Dec

    Perhaps the city Montreal is part of a time zone region. You may have to select the region to get the correct time.

    What region are you in?

    Example of Time Zone Regions:

    1) Newfoundland Time, including SE Labrador
    2) Atlantic Time - Nova Scotia (most places), PEI
    3) Atlantic Time - Nova Scotia - places that did not observe DST 1966-1971
    4) Atlantic Time - New Brunswick
    5) Atlantic Time - Labrador - most locations
    6) Atlantic Standard Time - Quebec - Lower North Shore
    7) Eastern Time - Ontario & Quebec - most locations
    8) Eastern Time - Ontario & Quebec - places that did not observe DST 1967-1973
    9) Eastern Time - Thunder Bay, Ontario
    10) Eastern Time - east Nunavut - most locations
    11) Eastern Time - Pangnirtung, Nunavut
    12) Central Time - Resolute, Nunavut
    13) Eastern Standard Time - Atikokan, Ontario and Southampton I, Nunavut
    14) Central Time - central Nunavut
    15) Central Time - Manitoba & west Ontario
    16) Central Time - Rainy River & Fort Frances, Ontario
    17) Central Standard Time - Saskatchewan - most locations
    18) Central Standard Time - Saskatchewan - midwest
    19) Mountain Time - Alberta, east British Columbia & west Saskatchewan
    20) Mountain Time - west Nunavut
    21) Mountain Time - central Northwest Territories
    22) Mountain Time - west Northwest Territories
    23) Mountain Standard Time - Creston, British Columbia
    24) Mountain Standard Time - Dawson Creek & Fort Saint John, British Columbia
    25) Pacific Time - west British Columbia
    26) Pacific Time - south Yukon
    27) Pacific Time - north Yukon

    Ubuntu supports hundreds of languages which would mean it supports the majority of time zones if not all. Discover the time zones ubuntu supports or supported time Zone regions. Then determine that time zone region Montreal is located in.

    Selecting Time Zones in Ubuntu


  • Istimsak Abdulbasir
    RE: Dual Boot of Windows 7 and Linux (Debian 7 or Centos 7)
    We may need to edit this files /etc/grub.d/10_linux directly if these previous experiment does not work. I never like to re-install an OS as the first choice to fixing a problem. You will learn more if you try to troubleshoot an issue manually. Re-install an OS if all other troubleshooting options fail. Always keep a second working system as a backup. You want to make sure you are productive in the event of a system failure. You still have two working Linux systems, CentOS and Debian. The bios requires you to manually choose an OS to boot. Make sure you still have that option. The fact that you can still boot-up a system is a plus. Since we will be working with CentOS, keep debian as your working backup.
    Link to this post 06 Dec

    We may need to edit this files /etc/grub.d/10_linux directly if these previous experiment does not work.

    I never like to re-install an OS as the first choice to fixing a problem. You will learn more if you try to troubleshoot an issue manually. Re-install an OS if all other troubleshooting options fail.

    Always keep a second working system as a backup. You want to make sure you are productive in the event of a system failure. You still have two working Linux systems, CentOS and Debian. The bios requires you to manually choose an OS to boot. Make sure you still have that option. The fact that you can still boot-up a system is a plus.

    Since we will be working with CentOS, keep debian as your working backup.

  • Istimsak Abdulbasir
    RE: Dual Boot of Windows 7 and Linux (Debian 7 or Centos 7)
    Both those files look alike. Ok, lets try something. Back a backup of both the grub.cfg and the boot.cfg files. I like nano but you are free to use whatever works. Save the backup copies of the files as, grub.cfg.backup, and, bott.cfg.backup. Keep then in the directory of their original files. Open grub.cfg in a terminal or gui editor. I gui editor like gedit may be easier. [b]Copy the header section representing debian;[/b] [color=blue]Found Debian GNU/Linux (7.6) on /dev/sda6[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6[/color] [color=blue]initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img[/color] [color=blue]}[/color] [color=blue]submenu 'Advanced options for Debian GNU/Linux (7.6) (on /dev/sda6)' $menuentry_id_option 'osprober-gnulinux-advanced-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6[/color] [color=blue]initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img[/color] [color=blue]}[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.10.0-123.el7.x86_64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-3.10.0-123.el7.x86_64 root=/dev/sda6[/color] [color=blue]initrd /initramfs-3.10.0-123.el7.x86_64.img[/color] [color=blue]}[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.2.0-4-amd64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-3.2.0-4-amd64 root=/dev/sda6[/color] [color=blue]initrd /initrd.img-3.2.0-4-amd64[/color] [color=blue]}[/color] [color=blue]}[/color] [color=blue][/color] Paste it under the last line from the header section representing CentOS; [color=purple]if [ "x$default" = 'CentOS Linux, with Linux 3.10.0-123.el7.x86_64' ]; then default='Advanced options for CentOS Linux>CentOS Linux, with Linux 3.10.0-123.el7.x86_64'; fi;[/color] [color=blue]Found Debian GNU/Linux (7.6) on /dev/sda6[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6[/color] [color=blue]initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img[/color] [color=blue]}[/color] [color=blue]submenu 'Advanced options for Debian GNU/Linux (7.6) (on /dev/sda6)' $menuentry_id_option 'osprober-gnulinux-advanced-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6[/color] [color=blue]initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img[/color] [color=blue]}[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.10.0-123.el7.x86_64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-3.10.0-123.el7.x86_64 root=/dev/sda6[/color] [color=blue]initrd /initramfs-3.10.0-123.el7.x86_64.img[/color] [color=blue]}[/color] [color=blue]menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.2.0-4-amd64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {[/color] [color=blue]insmod part_gpt[/color] [color=blue]insmod xfs[/color] [color=blue]set root='hd0,gpt2'[/color] [color=blue]if [ x$feature_platform_search_hint = xy ]; then[/color] [color=blue]search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]else[/color] [color=blue]search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288[/color] [color=blue]fi[/color] [color=blue]linux /vmlinuz-3.2.0-4-amd64 root=/dev/sda6[/color] [color=blue]initrd /initrd.img-3.2.0-4-amd64[/color] [color=blue]}[/color] [color=blue]}[/color] [color=blue][/color] The text in between the beginning header; ### BEGIN /etc/grub.d/30_os-prober ### and the ending header; ### END /etc/grub.d/30_os-prober ### should either be commented out or deleted. Commenting them out would be easier for the purpose of reversing what we did. Save the file, and reboot your system. Pay close attention to what the output of the boot process reports.
    Link to this post 04 Dec

    Both those files look alike.

    Ok, lets try something. Back a backup of both the grub.cfg and the boot.cfg files. I like nano but you are free to use whatever works. Save the backup copies of the files as, grub.cfg.backup, and, bott.cfg.backup. Keep then in the directory of their original files.

    Open grub.cfg in a terminal or gui editor. I gui editor like gedit may be easier.

    Copy the header section representing debian;

    Found Debian GNU/Linux (7.6) on /dev/sda6
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6
    initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img
    }
    submenu 'Advanced options for Debian GNU/Linux (7.6) (on /dev/sda6)' $menuentry_id_option 'osprober-gnulinux-advanced-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6
    initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img
    }
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.10.0-123.el7.x86_64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-3.10.0-123.el7.x86_64 root=/dev/sda6
    initrd /initramfs-3.10.0-123.el7.x86_64.img
    }
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.2.0-4-amd64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-3.2.0-4-amd64 root=/dev/sda6
    initrd /initrd.img-3.2.0-4-amd64
    }
    }

    Paste it under the last line from the header section representing CentOS;

    if [ "x$default" = 'CentOS Linux, with Linux 3.10.0-123.el7.x86_64' ]; then default='Advanced options for CentOS Linux>CentOS Linux, with Linux 3.10.0-123.el7.x86_64'; fi;

    Found Debian GNU/Linux (7.6) on /dev/sda6
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6
    initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img
    }
    submenu 'Advanced options for Debian GNU/Linux (7.6) (on /dev/sda6)' $menuentry_id_option 'osprober-gnulinux-advanced-5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-0-rescue-d327e0d3a7774d9a99721afb1894de53 root=/dev/sda6
    initrd /initramfs-0-rescue-d327e0d3a7774d9a99721afb1894de53.img
    }
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.10.0-123.el7.x86_64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-3.10.0-123.el7.x86_64 root=/dev/sda6
    initrd /initramfs-3.10.0-123.el7.x86_64.img
    }
    menuentry 'Debian GNU/Linux (7.6) (on /dev/sda6)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.2.0-4-amd64--5168491d-deb3-4360-8e0b-e6e6eea6fa8b' {
    insmod part_gpt
    insmod xfs
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 04a2e9c1-bc97-43b2-aeea-ae622405a288
    else
    search --no-floppy --fs-uuid --set=root 04a2e9c1-bc97-43b2-aeea-ae622405a288
    fi
    linux /vmlinuz-3.2.0-4-amd64 root=/dev/sda6
    initrd /initrd.img-3.2.0-4-amd64
    }
    }

    The text in between the beginning header;
    ### BEGIN /etc/grub.d/30_os-prober ###

    and the ending header;
    ### END /etc/grub.d/30_os-prober ###

    should either be commented out or deleted. Commenting them out would be easier for the purpose of reversing what we did. Save the file, and reboot your system. Pay close attention to what the output of the boot process reports.

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