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Version 5 AT&T UNIX delta: SCCS Optional (XSI) Make a delta (change) to an SCCS file PWB UNIX df: Filesystem Mandatory Report free disk space Version 1 AT&T UNIX diff: Text processing Mandatory Compare two files; see also cmp Version 5 AT&T UNIX dirname: Filesystem Mandatory Return the directory portion of a pathname; see also basename System ...
In computing, ver (short for version) is a command in various command-line interpreters such as COMMAND.COM, cmd.exe and 4DOS/4NT.It prints the name and version of the operating system, the command shell, or in some implementations the version of other commands.
The uname system call and command appeared for the first time in PWB/UNIX. Both are specified by POSIX. [1] [2] The GNU version of uname is included in the "sh-utils" or "coreutils" packages. uname itself is not available as a standalone program. The version of uname bundled in GNU coreutils was written by David MacKenzie. [3]
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]
Windows Subsystem for Linux (WSL) is a feature of Microsoft Windows that allows for using a Linux environment without the need for a separate virtual machine or dual booting. WSL is installed by default in Windows 11. [2] In Windows 10, it can be installed either by joining the Windows Insider program or manually via Microsoft Store or Winget. [3]
Terminal is a command-line front-end. It can run multiple command-line apps, including text-based shells in a multi-tabbed window. It has out-of-the-box support for Command Prompt, PowerShell, and Bash on Windows Subsystem for Linux (WSL). [6] It can natively connect to Azure Cloud Shell. [7]
A which command first appeared in 3BSD. [8] Carlo Wood developed the GNU implementation used in most Linux-based operating systems. [9] On FreeBSD, the which utility was originally written in Perl by Wolfram Schneider. The current version of which was rewritten by Daniel Papasian using the C programming language. [10]
In Linux, if the script was executed by a regular user, the shell would attempt to execute the command rm -rf / as a regular user, and the command would fail. However, if the script was executed by the root user, then the command would likely succeed and the filesystem would be erased. It is recommended to use sudo on a per-command basis instead.