[SOLVED] Where to find good resources to learn shell script?

Issue

I am currently having to work with scripts written by somebody else. I have very basic understanding of scripting but the scripts I am dealing with have flags such as -i,-e, -o,-v, -h etc......

I just could not decode the script below.

sed -i -e  's/^\(var = \)$/\1 "'"$1"'"/' /some/dir

Are there any tutorials, books, articles that could teach intermediate-advanced scripting?

Solution

For things like command-line flags I usually refer to the man page. In the case of the example above, running man sed should show the manual for sed describing command line options.

For bash scripting in general (the title of the question), I recommend Greg's bash guide at https://mywiki.wooledge.org/BashGuide and the associated FAQ: https://mywiki.wooledge.org/BashFAQ

Answered By - janneb

Answer Checked By - Marie Seifert (WPSolving Admin)