(From man bash)
The test command sorts using ASCII ordering.
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-a file True if file exists. -b file True if file exists and is a block special file. -c file True if file exists and is a character special file. -d file True if file exists and is a directory. -e file True if file exists. -f file True if file exists and is a regular file. -g file True if file exists and is set-group-id. -h file True if file exists and is a symbolic link. -k file True if file exists and its ``sticky'' bit is set. -p file True if file exists and is a named pipe (FIFO). -r file True if file exists and is readable. -s file True if file exists and has a size greater than zero. -t fd True if file descriptor fd is open and refers to a terminal. -u file True if file exists and its set-user-id bit is set. -w file True if file exists and is writable. -x file True if file exists and is executable. -G file True if file exists and is owned by the effective group id. -L file True if file exists and is a symbolic link. -N file True if file exists and has been modified since it was last read. -O file True if file exists and is owned by the effective user id. -S file True if file exists and is a socket. file1 -ef file2 True if file1 and file2 refer to the same device and inode numbers. file1 -nt file2 True if file1 is newer (according to modification date) than file2, or if file1 exists and file2 does not. file1 -ot file2 True if file1 is older than file2, or if file2 exists and file1 does not. |