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→The test Command
|<nowiki>-e</nowiki>
|File exists
|-e /etc/passwd
|-
|<nowiki>-r</nowiki>
|File is readable
|-r /etc/hosts
|-
|<nowiki>-w</nowiki>
|File is writable
|-w /tmp
|-
|<nowiki>-x</nowiki>
|File is executable
|-x /usr/bin/ls
|-
|<nowiki>-f</nowiki>
|File is a regular file
|-f /dev/tty
|-
|<nowiki>-d</nowiki>
|File is a directory
|-d /dev/tty
|}