NOHUP(1) - General Commands Manual # NOHUP(1) - General Commands Manual
NAME # nohup - invoke a command immune to hangups
SYNOPSIS # nohup utility [arg …]
DESCRIPTION # The nohup command allows the specified utility to be protected from termination if the user should become logged out (for example, due to a modem line or TCP/IP connection being dropped). To do this, nohup sets the SIGHUP signal(3) (“terminal line hangup”) to be ignored, then executes utility along with any arguments.
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PRINTENV(1) - General Commands Manual # PRINTENV(1) - General Commands Manual
NAME # printenv - print out the environment
SYNOPSIS # printenv [name]
DESCRIPTION # printenv prints out the names and values of the variables in the environment, with one name/value pair per line. If name is specified, only its value is printed.
EXIT STATUS # If a name is specified and it is not defined in the environment, printenv returns exit status 1, else it returns status 0.
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SCRIPT(7) - Miscellaneous Information Manual # SCRIPT(7) - Miscellaneous Information Manual
NAME # script - interpreter script execution
DESCRIPTION # The system is capable of treating a text file containing commands intended for an interpreter, such as sh(1) or awk(1), as an executable program.
An “interpreter script” is a file which has been set executable (see chmod(2)) and which has a first line of the form:
#! pathname [argument]
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SH(1) - General Commands Manual # SH(1) - General Commands Manual
NAME # sh - command language interpreter
SYNOPSIS # sh [-abCefhimnuvx] [-o option] [-c string | -s | file]
DESCRIPTION # The sh utility is a command language interpreter: it reads one or more commands, either from the command line or from a file (a shell script), and then sets about executing those commands. Thus it is the main interface between the user and the operating system.
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TIME(1) - General Commands Manual # TIME(1) - General Commands Manual
NAME # time - time command execution
SYNOPSIS # time [-lp] utility [argument …]
DESCRIPTION # time executes and times utility. After the utility finishes, time writes the total time elapsed, the time consumed by system overhead, and the time used to execute utility to the standard error stream. Times are reported in seconds.
The options are as follows:
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WHICH(1) - General Commands Manual # WHICH(1) - General Commands Manual
NAME # which - locate a program file (or files) in the path
SYNOPSIS # which [-a] name …
DESCRIPTION # which takes a list of names and looks for the files which would be executed had these names been given as commands. Each argument is searched for along the user’s path.
If the -a flag is given, which will return a list of all matches instead of just the first match.
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