(ICMP) packets. Pinging involves sending an ICMP echo request to the target host and waiting for an ICMP echo reply. The program reports errors, packet loss...

Version 2 Unix. echo -n in Version 7 replaced prompt, (which behaved like echo but without terminating its output with a line delimiter). On PWB/UNIX and later...

files, known as shell scripts, facilitating automation. In keeping with Unix shell conventions, Bash incorporates a rich set of features. The keywords...

of the data it received. On UNIX-like operating systems an echo server is built into the inetd family of daemons. The echo service is usually not enabled...

rc (for "run commands") is the command line interpreter for Version 10 Unix and Plan 9 from Bell Labs operating systems. It resembles the Bourne shell...

Single UNIX Specification (SUS) is a standard for computer operating systems, compliance with which is required to qualify for using the "UNIX" trademark...

applications List of Unix daemons List of web browsers for Unix and Unix-like operating systems Unix philosophy util-linux The Wikibook Guide to UNIX has a page...

via the operating system shell. Make is widely used, especially in Unix and Unix-like operating systems, even though many competing technologies and...

Fish (stylized in lowercase) is a Unix shell with a focus on interactivity and usability. Fish is designed to be feature-rich, rather than highly configurable...

The term "Research Unix" refers to early versions of the Unix operating system for DEC PDP-7, PDP-11, VAX and Interdata 7/32 and 8/32 computers, developed...

different one via telnet, ssh, dial-up, or over a direct serial connection. On Unix-like operating systems, it is common to have one or more terminal windows...

xargs (short for "extended arguments" ) is a command on Unix and most Unix-like operating systems used to build and execute commands from standard input...

rm (short for remove) is a basic command on Unix and Unix-like operating systems used to remove objects such as computer files, directories and symbolic...

The cron command-line utility is a job scheduler on Unix-like operating systems. Users who set up and maintain software environments use cron to schedule...

systems perform local echo themselves, in their device drivers and so forth. In Unix and POSIX-compatible systems, local echo is a flag in the POSIX...

yes is a command on Unix and Unix-like operating systems, which outputs an affirmative response, or a user-defined string of text, continuously until...

nl is a Unix utility for numbering lines, either from a file or from standard input, reproducing output on standard output. nl is part of the X/Open Portability...

In computing, at is a command in Unix-like operating systems, Microsoft Windows, and ReactOS used to schedule commands to be executed once, at a particular...

In the Unix operating system, shar (from "shell archive") is an archive format created with the Unix shar utility. A shar file is a type of self-extracting...

error or non-malicious meddling. The md5sum program is included in most Unix-like operating systems or compatibility layers such as Cygwin. The original...

read is a command found on Unix and Unix-like operating systems such as Linux. It reads a line of input from standard input or a file passed as an argument...

common GNU Unix-like utilities. For example: $ echo -e "foo\tbar" | expand | xxd -g 1 -u 0000000: 66 6F 6F 20 20 20 20 20 62 61 72 0A foo bar. $ echo -e "foo\tbar"...

characters looking similar). od is one of the earliest Unix programs, having appeared in version 1 AT&T Unix. It is also specified in the POSIX standards. The...

In Unix-like operating systems, true and false are commands whose only function is to always return with a predetermined exit status. Programmers and scripts...

cmd.exe) reads the file and executes its commands, normally line-by-line. Unix-like operating systems, such as Linux, have a similar, but more flexible...

sed ("stream editor") is a Unix utility that parses and transforms text, using a simple, compact programming language. It was developed from 1973 to 1974...

Unix, Plan 9, and Unix-like operating systems that evaluates conditional expressions. test was turned into a shell builtin command in 1981 with UNIX System...

of Unix. Throughout the 1960s and 1970s McIlroy contributed programs for Multics (such as RUNOFF) and Unix operating systems (such as diff, echo, tr...

The C shell (csh or the improved version, tcsh) is a Unix shell created by Bill Joy while he was a graduate student at University of California, Berkeley...

wall (an abbreviation of write to all) is a Unix command-line utility that displays the contents of a computer file or standard input to all logged-in...