-O FILE (conditional operator)

true if the file exists and is owned by the effective user ID.

-O is not included in POSIX.1-2017.

Links

• Effective user ID on Wikipedia
• Bash manual

Examples

Different ways to test if a file is owned by the effective user ID:

1 2 3 4

test -O ~/file && echo "owned by euid" [ -O ~/file ] && echo "owned by euid" # Bash [[ -O ~/file ]] && echo "owned by euid"