How to check the first character in a string in Bash or UNIX shell?
Many ways to do this. You could use wildcards in double brackets:
str="/some/directory/file"if [[ $str == /* ]]; then echo 1; else echo 0; fiYou can use substring expansion:
if [[ ${str:0:1} == "/" ]] ; then echo 1; else echo 0; fiOr a regex:
if [[ $str =~ ^/ ]]; then echo 1; else echo 0; fi
Consider the case statement as well which is compatible with most sh-based shells:
case $str in/*) echo 1 ;;*) echo 0 ;;esac
$ foo="/some/directory/file"$ [ ${foo:0:1} == "/" ] && echo 1 || echo 01$ foo="server@10.200.200.20:/some/directory/file"$ [ ${foo:0:1} == "/" ] && echo 1 || echo 00