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Allows a command to continue running after logging out nproc: Queries the number of (active) processors pathchk: Checks whether file names are valid or portable pinky: A lightweight version of finger: printenv: Prints environment variables: printf: Formats and prints data pwd: Prints the current working directory: readlink: Displays value of a ...
Support for command history means that a user can recall a previous command into the command-line editor and edit it before issuing the potentially modified command. Shells that support completion may also be able to directly complete the command from the command history given a partial/initial part of the previous command.
Shellshock, also known as Bashdoor, [1] is a family of security bugs [2] in the Unix Bash shell, the first of which was disclosed on 24 September 2014.Shellshock could enable an attacker to cause Bash to execute arbitrary commands and gain unauthorized access [3] to many Internet-facing services, such as web servers, that use Bash to process requests.
Command history is a feature in many operating system shells, computer algebra programs, and other software that allows the user to recall, edit and rerun previous commands. Command line history was added to Unix in Bill Joy 's C shell of 1978; Joy took inspiration from an earlier implementation in Interlisp . [ 1 ]
A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language, and is used by the operating system to control the execution of the system using shell scripts. [2]
The restricted shell is a Unix shell that restricts some of the capabilities available to an interactive user session, or to a shell script, running within it.It is intended to provide an additional layer of security, but is insufficient to allow execution of entirely untrusted software.
[2] [3] Other early contributors to the ideas or the code were Michael Ubell, Eric Allman, Mike O'Brien and Jim Kulp. [4] The C shell is a command processor which is typically run in a text window, allowing the user to type and execute commands.
TCC is based on the earlier 4DOS command shell for DOS, and 4OS2 for OS/2. [4]Beginning with version 12 of 4NT, support for Windows 95, 98, ME, NT and 2000 were removed. Beginning with version 16 of TCC, support for Windows XP was removed, [1] although it might still run in XP. 4NT was renamed to Take Command Console as part of JP Software's Take Command versi