Man Pages – Linux Manual Pages

crypt – password and data encryption
USAGE
#define _XOPEN_SOURCE
#include <unistd.h>

char *crypt(const char *key, const char *salt);

DESCRIPTION
crypt() is the password encryption function. It is based on the [...]

chsh – change your login shell
USAGE
chsh [ -s shell ] [ -l ] [ -u ] [ -v ] [ username ]

DESCRIPTION
chsh is used to change your login shell. If a shell is not given on
[...]

sh – command interpreter (shell)
USAGE
sh [-/+aCefnuvxIimqsVEbc] [-o longname] [target ...]

DESCRIPTION
Sh is the standard command interpreter for the system. The current ver-
sion of sh is in the process of being changed to conform with the POSIX
1003.2 [...]

sh – command interpreter (shell)
USAGE
sh [-/+aCefnuvxIimqsVEbc] [-o longname] [target ...]

DESCRIPTION
Sh is the standard command interpreter for the system. The current ver-
sion of sh is in the process of being changed to conform with the POSIX
1003.2 [...]

ac – print statistics about users’ connect time
USAGE
ac [ -d | --daily-totals ] [ -y | --print-year ]
[ -p | --individual-totals ] [ people ]
[...]