Linux shell script shebang env All In One
Linux shell script shebang env All In One
指定 shell script 的运行环境
shell script shebang env
hash bang env
#!\usr\bin\env bash ❌
#!\usr\bin\env bash
# ❌
#!/usr/bin/env ✅
#!/usr/bin/env bash
✅
demos
#!/usr/bin/env bash
# ✅
export N=1
# case 1 数字
# suceess exit ✅
# ✅
case "$N" in
1)
echo 'case 1 数字';;
2)
echo 'case 2 数字';;
*)
echo 'default case 数字 *'
echo 'error exit ❌'
exit 1
;;
esac
echo 'suceess exit ✅'
exit 0
refs
https://www.cyberciti.biz/tips/finding-bash-perl-python-portably-using-env.html
https://unix.stackexchange.com/questions/29608/why-is-it-better-to-use-usr-bin-env-name-instead-of-path-to-name-as-my
https://www.baeldung.com/linux/bash-shebang-lines
https://stackoverflow.com/questions/43793040/how-does-usr-bin-env-work-in-a-linux-shebang-line
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