![]() ![]() Symbolic links in the user's PATH (such as /bin).Shell scripts, which essentially provide the full ability to create new system commands.Where it would not be simple, the recommendation is usually to use one of the following: The Bash and Korn shells instead use shell functions - see § Alternatives below.Īliases should usually be kept simple. Would instead expand to ls | more /etc /usr which incorrectly attempts to open the directories in more. Non-persistent aliases can be created by supplying name/value pairs as arguments for the alias command. Usage Creating aliases Common Unix shells ![]() The alias command has also been ported to the IBM i operating system. Cases where aliases are necessary include situations where chained aliases are required (bash and ksh). With shells that support both functions and aliases but no parameterized inline shell scripts, the use of functions wherever possible is recommended. The alias concept from csh was imported into Bourne Again Shell (bash) and the Korn shell (ksh). Older versions of the Bourne shell did not offer aliases, but it did provide functions, which are more powerful than the csh alias concept. This was useful for creating simple shortcut commands, but not more complex constructs. C shell aliases were strictly limited to one line. In Unix, aliases were introduced in the C shell and survive in descendant shells such as tcsh and bash. The alias commands may either be written in the config file directly or sourced from a separate file. bashrc) so that they will be available upon the start of the corresponding shell session. Regularly used aliases can be set from the shell's rc file (such as. Aliasing functionality in the MS-DOS and Microsoft Windows operating systems is provided by the DOSKey command-line utility.Īn alias will last for the life of the shell session. alias is available in Unix shells, AmigaDOS, 4DOS/ 4NT, KolibriOS, Windows PowerShell, ReactOS, and the EFI shell. It is mainly used for abbreviating a system command, or for adding default arguments to a regularly used command. In computing, alias is a command in various command-line interpreters ( shells), which enables a replacement of a word by another string. Unix, Unix-like, AmigaDOS, Microsoft Windows, ReactOS, AROS, KolibriOS, IBM i Various open-source and commercial developers
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