what does this shell command do? "${f// /_}"
133569
What does the double slash mean in `${f// /_}`?
9681
What is the double slash (//) directory?
25478
What does ${1+"$@"} mean in a shell script, and how does it differ from "$@"?
100254
What does 'exec {fd}</dev/watchdog' do in Bash
76281
What does $(command) & do?
61814
What is the "eval" command in bash?
45662
What is `$?` ? Is it a variable?
112170
What does --shell-escape do?
127087
What does the "|" (single pipe) do in JavaScript?
139223
How do I pipe each command given to the shell?
129350
What is the meaning of ${GZIP_BINDIR-'/bin'} in bash?
38402
What is the meaning of the ${0##...} syntax with variable, braces and hash character in bash?
14779
How do ${0##*/} and ${0%/*} work?
35334
What is the general syntax of a Unix shell command?
43652
What does the -f parameter do in the tar command
832
What are the shell's control and redirection operators?
144095
What do these commands mean?