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+ | ====== Bash Scripting ====== | ||
+ | ===== Resources ===== | ||
+ | |||
+ | * [[http:// | ||
+ | |||
+ | ===== Useful Tricks ===== | ||
+ | |||
+ | ==== Existence of a Directory ==== | ||
+ | |||
+ | if [ -z "`ls the/ | ||
+ | |||
+ | ==== Getting the First Word in a String ==== | ||
+ | |||
+ | Examples, using '' | ||
+ | |||
+ | wc_count=`wc -l SOMETHING | cut -d' ' -f1` | ||
+ | |||
+ | or | ||
+ | |||
+ | wc_count=`wc -l SOMETHING | awk '{ print $1 }'` | ||
+ | |||
+ | or | ||
+ | |||
+ | wc_count=`wc -l SOMETHING | (read X Y; echo $X)` | ||
+ | |||
+ | or | ||
+ | | ||
+ | wc_count=`wc -l SOMETHING | sed -e 's/ .*//'` | ||
+ | |||
+ | or | ||
+ | |||
+ | wc_count=`wc -l SOMETHING` | ||
+ | wc_count=${wc_count% SOMETHING} | ||
+ | |||
+ | or | ||
+ | |||
+ | function first { echo $1 } | ||
+ | wc_count=$(first $(wc -l SOMETHING)) |