Bash: if and typecheck

2018-06-20 07:14:35

This question already has an answer here:

Extract filename and extension in Bash 35 answers

使用case语句。

case "$file" in
*.txt) emacs $file ;;
*.zip) zip   $file ;;
esac

You can either use:

if [ ${file: -4} == ".txt" ]
and thus compare the last 4 characters

Or use:

if [[ $file == *.txt ]]
and thus use a regular expression (double brackets are available only in some shells but it is available in bash ).

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