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The alias concept from csh was imported into Bourne Again Shell (bash) and the Korn shell (ksh). With shells that support both functions and aliases but no parameterized inline shell scripts, the use of functions wherever possible is recommended. Cases where aliases are necessary include situations where chained aliases are required (bash and ksh).
alias: Misc Mandatory Define or display aliases ar: Misc Mandatory Create and maintain library archives Version 1 AT&T UNIX asa: Text processing Optional (FR) Interpret carriage-control characters System V at: Process management Mandatory Execute commands at a later time Version 7 AT&T UNIX awk: Text processing Mandatory
Alias argument selectors; the ability to define an alias to take arguments supplied to it and apply them to the commands that it refers to. Tcsh is the only shell that provides this feature (in lieu of functions). \!# - argument selector for all arguments, including the alias/command itself; arguments need not be supplied.
This is a list of commands from the GNU Core Utilities for Unix environments. These commands can be found on Unix operating systems and most Unix-like operating systems.. GNU Core Utilities include basic file, shell and text manipulation utilities.
Since its inception, Bash has gained widespread adoption and is commonly used as the default login shell for numerous Linux distributions. It holds historical significance as one of the earliest programs ported to Linux by Linus Torvalds, alongside the GNU Compiler . [13]
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Since getent uses the same name service as the system, getent will show all information, including that gained from network information sources such as LDAP. The databases it searches in are: ahosts, ahostsv4, ahostsv6, aliases, ethers (Ethernet addresses), group, gshadow, hosts, netgroup, networks, passwd, protocols, rpc, services, and shadow.