bash-script-tips.md

bash-script-tips.md

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Header

#!/usr/bin/env bash

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Condition

if [[ condition ]]; then
  statement
fi

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List

listVar="1 2 3"
for i in $listVar; do
  echo $i
done

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Read

read VAR
echo $VAR

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Test file exists

-e $filename

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Test directory exists

-d $dir

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Fail cause exit immediately

set -e

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Bash Switch

case "$C" in
"1")
    do_this()
    ;;
"2" | "3")
    do_what_you_are_supposed_to_do()
    ;;
*)
    do_nothing()
    ;;
esac

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Can a Bash script tell what directory it's stored in?

http://stackoverflow.com/questions/59895/can-a-bash-script-tell-what-directory-its-stored-in

DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

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Turn off the substitution

http://serverfault.com/questions/208265/what-is-bash-event-not-found

set +H

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If success then else

cmd && echo success || echo fail