shell script
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2018

1

Substitution, dirname, basename and suffix Substitution can be used to get path and short filename. filename=a/b/c/name.file echo ${filename#*/} # b/c/name.file echo ${filename##*/} # name.file echo ${filename%/*} # a/b/c echo ${filename%%/*} # a But in fact, there is better way: filename=a/b/c/name.file echo $(dirname $filename) echo $(basename $filename) Still, substitution is useful for getting filename without suffix or getting suffix. filename=file.name.type echo ${filename%.*} # file.name echo ${filename##*.} # type Parameter Expansion String selection: string=1234567890abcdefg echo ${string: 10} # abcdefg echo ${string: 10:5} # abcde echo ${string: 7:-4} # 890abc Array selection: arr=(0 1 2) arr=($