On Arch, `/bin/sh` is a symlink to `bash`. When Bash is invoked with the name `sh`, it behaves closer to the historical Bourne shell. The differences between

On Arch, `/bin/sh` is a symlink to `bash`. When Bash is invoked with the name `sh`, it behaves closer to the historical Bourne shell. The differences between normal Bash behavior and the behavior when invoked as `sh`: - It behaves as if `--posix` was given. - It behaves as if `--norc` was given. - If it looks for a user profile file (i.e. it is a login shell), then it only looks at ~/.profile (instead of the usual behavior of giving precedence to ~/.bash_profile then ~/.bash_login then ~/.profile) - At startup, if $ENV is set, it `source "$ENV"`.