| -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 (regardless of type). |
| -f file |
| | True if file exists and is a regular file. |
| -g file |
| | True if file exists and its set group ID flag is set. |
| -h file |
| | True if file exists and is a symbolic link. This operator is retained for compatibility with previous versions of this program. Do not rely on its existence; use -L instead. |
| -k file |
| | True if file exists and its sticky bit is set. |
| -n string |
| | True if the length of string is nonzero. |
| -p file |
| | True if file 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 file_descriptor |
| | True if the file whose file descriptor number is file_descriptor is open and is associated with a terminal. |
| -u file |
| | True if file exists and its set user ID flag is set. |
| -w file |
| | True if file exists and is writable. True indicates only that the write flag is on. The file is not writable on a read-only file system even if this test indicates true. |
| -x file |
| | True if file exists and is executable. True indicates only that the execute flag is on. If file is a directory, true indicates that file can be searched. |
| -z string |
| | True if the length of string is zero. |
| -L file |
| | True if file exists and is a symbolic link. |
| -O file |
| | True if file exists and its owner matches the effective user id of this process. |
| -G file |
| | True if file exists and its group matches the effective group id of this process. |
| -S file |
| | True if file exists and is a socket. |
| file1-nt file2 |
| | True if file1 exists and is newer than file2. |
| file1-ot file2 |
| | True if file1 exists and is older than file2. |
| file1-ef file2 |
| | True if file1 and file2 exist and refer to the same file. |
| string |
| | True if string is not the null string. |
| s1 = s2 | True if the strings s1 and s2 are identical. |
| s1 != s2 | True if the strings s1 and s2 are not identical. |
| s1 < s2 | True if string s1 comes before s2 based on the binary value of their characters. |
| s1 > s2 | True if string s1 comes after s2 based on the binary value of their characters. |
| n1-eq n2 | True if the integers n1 and n2 are algebraically equal. |
| n1-ne n2 | True if the integers n1 and n2 are not algebraically equal. |
| n1-gt n2 | True if the integer n1 is algebraically greater than the integer n2. |
| n1-ge n2 | True if the integer n1 is algebraically greater than or equal to the integer n2. |
| n1-lt n2 | True if the integer n1 is algebraically less than the integer n2. |
| n1-le n2 | True if the integer n1 is algebraically less than or equal to the integer n2. |
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