Linux notebook / test
Description: Documents various Linux or *nix programs and concepts, including qmail, djbdns, emacs, Perl, hardware, bash, TCP/IP, DNS, etc...
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Apache Awk Bash C cftp daemontools DHCP djbdns DNS Emacs Email ezmlm Fetchmail find GDB Hardware HTML HTTP Intro ISDN less Make Math mc mirrordir MySQL Peripherals Perl PHP3 pppd qmail Regexps Shell System Tables test To do Typical ucspi-tcp Versions Index TCP/IP slides
test |  | top

> test evaluation

> File type tests
> `-b file` | True if file exists and is block special.
> `-c file` | True if file exists and is character special.
> `-d file` | True if file exists and is a directory.
> `-f file` | True if file exists and is a regular file.
> `-h file` or `-L file` | True if file exists and is a symbolic link.
> `-p file` | True if file exists and is a named pipe.
> `-S file` | True if file exists and is a socket.
> `-T [fd]` | True if fd is opened on a terminal. If fd is omitted, it defaults to 1 (standard output).
> Access permission tests
> `-g file` | True if file exists and is set-group-id.
> `-k file` | True if file has its ``sticky'' bit set.
> `-r file` | True if file exists and is readable.
> `-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.
> `-O file` | True if file exists and is owned by the effective user id.
> `-G file` | True if file exists and is owned by the effective group id.
> File characteristics tests
> `-e file` | True if file exists
> `-s file` | True if file exists and has a size greater than zero.
> `file1 -nt file2` | True if file1 is newer (according to modification date) than file2.
> `file1 -ot file2` | True if file1 is older than file2.
> `file1 -ef file2` | True if file1 and file2 have the same device and inode numbers.
> String tests
> `-z string` | True if the length of string is zero.
> `-n string` or `string` | True if the length of string is non-zero.
> `string1 = string2` | True if the strings are equal.
> `string1 != string2` | True if the strings are not equal.
> Numeric tests
> `arg1 -eq arg2` | Arithmetic binary operator that returns true iif arg1 is equal to arg2. arg1 and arg2 may be positive integers, negative integers, or the special expression -l string, which evaluates to the length of string.
> `arg1 -ne arg2` | Arithmetic binary operator that returns true iif arg1 is not-equal to arg2. See -eq for args.
> `arg1 -lt arg2` | Arithmetic binary operator that returns true iif arg1 is less-than arg2. See -eq for args.
> `arg1 -le arg2` | Arithmetic binary operator that returns true iif arg1 is less-than-or-equal than arg2. See -eq for args.
> `arg1 -gt arg2` | Arithmetic binary operator that returns true iif arg1 is greater-than arg2. See -eq for args.
> `arg1 -ge arg2` | Arithmetic binary operator that returns true iif arg1 is greater-than-or-equal than arg2. See -eq for args.
> Connectives for test
> `! expr` | True if expr is false.
> `expr1 -a expr2` | True if both expr1 and expr2 are true.
> `expr1 -o expr2` | True if either expr1 or expr2 is true.

Last update: Wed, 2 Nov 2005 10:16:21 GMT | top