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In computing, redirection is a form of interprocess communication, and is a function common to most command-line interpreters, including the various Unix shells that can redirect standard streams to user-specified locations. The concept of redirection is quite old, dating back to the earliest operating systems (OS).
In computing, command substitution is a facility that allows a command to be run and its output to be pasted back on the command line as arguments to another command. Command substitution first appeared in the Bourne shell , [ 1 ] introduced with Version 7 Unix in 1979, and has remained a characteristic of all later Unix shells .
sudo is unable to pipe the standard output to a file. By dumping its stdout stream into /dev/null, we also suppress the mirrored output in the console. The command above gives the current user root access to a server over ssh, by installing the user's public key to the server's key authorization list.
PowerShell is a task automation and configuration management program from Microsoft, consisting of a command-line shell and the associated scripting language.Initially a Windows component only, known as Windows PowerShell, it was made open-source and cross-platform on August 18, 2016, with the introduction of PowerShell Core. [5]
Aliases should usually be kept simple. Where it would not be simple, the recommendation is usually to use one of the following: Shell scripts, which essentially provide the full ability to create new system commands. Symbolic links in the user's PATH (such as /bin). This method is useful for providing an additional way of calling the command ...
Windows PowerShell on Windows Vista Midnight Commander using box-drawing characters. In Windows, a console application may run in two modes. One mode places the text in a window and uses an operating system's font rendering. In this mode, an application's interaction with user is controlled by the windowing system.
Multics had a pwd command (which was a short name of the print_wdir command) [11] from which the Unix pwd command originated. [12] The command is a shell builtin in most Unix shells such as Bourne shell, ash, bash, ksh, and zsh.
Don Norman suggests changing the common technical attitude towards user error: ... [16] when the user is the one who caused the error, ...