test (arguments) Flashcards
True if FILE exists.
[ -a FILE ]
True if FILE exists and is a block-special file.
[ -b FILE ]
True if FILE exists and is a character-special file.
[ -c FILE ]
True if FILE exists and is a directory.
[ -d FILE ]
True if FILE exists.
[ -e FILE ]
True if FILE exists and is a regular file.
[ -f FILE ]
True if FILE exists and its SGID bit is set.
[ -g FILE ]
True if FILE exists and is a symbolic link.
[ -h FILE ]
True if FILE exists and its sticky bit is set.
[ -k FILE ]
True if FILE exists and is a named pipe (FIFO).
[ -p FILE ]
True if FILE exists and is readable.
[ -r FILE ]
True if FILE exists and has a size greater than zero.
[ -s FILE ]
True if file descriptor FD is open and refers to a terminal.
[ -t FD ]
True if FILE exists and its SUID (set user ID) bit is set.
[ -u FILE ]
True if FILE exists and is writable.
[ -w FILE ]
True if FILE exists and is executable.
[ -x FILE ]
True if FILE exists and is owned by the effective user ID.
[ -O FILE ]
True if FILE exists and is owned by the effective group ID.
[ -G FILE ]
True if FILE exists and is a symbolic link.
[ -L FILE ]
True if FILE exists and has been modified since it was last read.
[ -N FILE ]
True if FILE exists and is a socket.
[ -S FILE ]
True if FILE1 has been changed more recently than FILE2, or if FILE1 exists and FILE2 does not.
[ FILE1 -nt FILE2 ]
True if FILE1 is older than FILE2, or is FILE2 exists and FILE1 does not.
[ FILE1 -ot FILE2 ]
True if FILE1 and FILE2 refer to the same device and inode numbers.
[ FILE1 -ef FILE2 ]
True if shell option “OPTIONNAME” is enabled.
[ -o OPTIONNAME ]
True if the length of “STRING” is zero.
[ -z STRING ]
True if the length of “STRING” is non-zero.
[ -n STRING ] or [ STRING ]
True if the strings are equal. “=” may be used instead of “==” for strict POSIX compliance.
[ STRING1 == STRING2 ]
True if the strings are not equal.
[ STRING1 != STRING2 ]
True if “STRING1” sorts before “STRING2” lexicographically in the current locale.
[ STRING1 < STRING2 ]
True if “STRING1” sorts after “STRING2” lexicographically in the current locale.
[ STRING1 > STRING2 ]
True if EXPR is false.
[ ! EXPR ]
Returns the value of EXPR. This may be used to override the normal precedence of operators.
[ ( EXPR ) ]
True if both EXPR1 and EXPR2 are true.
[ EXPR1 -a EXPR2 ]
True if either EXPR1 or EXPR2 is true.
[ EXPR1 -o EXPR2 ]
