The shell is your friend. But many developers don’t really know the shell, the Unix or Linux command-line environment available in several operating systems. (Bash is the best known, but there are others.)
Some of you, when you transitioned from Windows to Mac, took your (slow) clickety habits with you, not realizing that the power laid in that app called Terminal hidden under Applications somewhere. Some of you have been shelling into “the server” to tweak a setting or two without realizing that you could automate your life away without even cracking a devops tool.
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