Questions tagged [alias]

An alias is essentially nothing more than a keyboard shortcut, an abbreviation, a means of avoiding typing a long command sequence. This can save a great deal of typing at the command-line and avoid having to remember complex combinations of commands and options.

350
votes
14answers
57k views

In Bash, when to alias, when to script, and when to write a function?

It's taken me almost 10 years of Linux usage to ask this question. It was all trial and error and random late-night internet surfing. But people shouldn't need 10 years for this. If I were just ...
253
votes
19answers
176k views

How to have tail -f show colored output

I'd like to be able to tail the output of a server log file that has messages like: INFO SEVERE etc, and if it's SEVERE, show the line in red; if it's INFO, in green. What kind of alias can I setup ...
205
votes
5answers
156k views

Why doesn't my Bash script recognize aliases?

In my ~/.bashrc file reside two definitions: commandA, which is an alias to a longer path commandB, which is an alias to a Bash script I want to process the same file with these two commands, so I ...
159
votes
6answers
32k views

Run a command that is shadowed by an alias

Let's say I have the following alias in bash - alias ls='ls --color=auto' - and I want to call ordinary ls without options. Is the only way to do that is to unalias, do the command and then alias ...
119
votes
35answers
56k views

Quick directory navigation in the bash shell

I would like to frequently switch between directories that are in totally unrelated paths, for example /Project/Warnest/docs/ and ~/Dropbox/Projects/ds/test/. But I don't want to type cd /[full-path]/...
82
votes
8answers
93k views

How can I install the `ll` command on Mac OS X?

I'm using Mac OS X. When I SSH into servers I find the ll command useful, but it's not available on my local machine. How can I install it?
75
votes
6answers
24k views

How to use `which` on an aliased command?

Like most users, I have a bunch of aliases set up to give a default set of flags for frequently used programs. For instance, alias vim='vim -X' alias grep='grep -E' alias ls='ls -G' The problem is ...
60
votes
5answers
41k views

How to pass parameters to an alias?

For bash script, I can use "$@" to access arguments. What's the equivalent when I use an alias?
56
votes
5answers
33k views

What is the difference between ls and l? [duplicate]

I accidentally typed l instead of ls today and found that the command still printed a list of the files in my current directory. Trying l --help brings up the help file for ls suggesting that l is ...
55
votes
2answers
13k views

watch command alias expansion

If a run the watch command containing an alias, it will not expand the alias. I have tried both with single quote and double quotes, in fact given the following alias: # alias ll alias ll='ls -l --...
51
votes
3answers
59k views

Refresh aliases and functions after defining new aliases and functions?

When I define a new alias in .bash_aliases file or a new function in .bashrc file, is there some refresh command to be able immediately use the new aliases or functions without closing the terminal (...
50
votes
4answers
17k views

How do I get bash completion for command aliases?

I am looking to get tab-completion on my command line aliases, for example, say I defined the following alias : alias apt-inst='sudo aptitude install' Is there a way to get the completions provided ...
48
votes
5answers
24k views

How can I `alias sudo !!`?

I'm trying to set an alias for sudo !! in Bash. I tried alias sbb='sudo !!', but it interprets that as a literal !! and prints sudo: !!: command not found If I use double quotes, it substitutes ...
41
votes
10answers
63k views

Show only hidden files (dot files) in ls alias

I'm using the command ls -a | grep '^\.' for showing only the hidden files. I added the line alias hidden='ls -a | grep '^\.'' # show only hidden files to .bash_aliases file but this does not ...
37
votes
4answers
22k views

How can I find a rogue alias declaration?

I'm trying to find where a specific alias has been declared. I've searched all the usual places I know to look for aliases: ~/.bashrc ~/.bash_profile /etc/bashrc /etc/profile With no luck. I know ...
36
votes
1answer
8k views

Aliases vs functions vs scripts

This site says, "Shell functions are faster [than aliases]. Aliases are looked up after functions and thus resolving is slower. While aliases are easier to understand, shell functions are preferred ...
35
votes
4answers
8k views

aliasing cd to pushd - is it a good idea?

Is it a good idea to use the following alias: cd() { pushd $1; } in bash? I think this would be very useful, since I can then use a series of popds instead of just a cd - once. Is there any ...
33
votes
4answers
7k views

Is there a 'rc' configuration file for grep/egrep? (~/.egreprc?)

I usually do some grep when developing, and there are some extensions that I always don't want to look for (like *.pyc). Is it possible to create a ~/.egreprc or something like that, and put some ...
32
votes
2answers
23k views

alias vs export for simple commands

For simple commands like less, is it better to make an alias or to export the options? Is there any benefit of one over the other? For example, if I want less to always use the -R option to show raw ...
29
votes
3answers
48k views

How do I permanently remove an Alias from my Shell

When I was not near my computer some guy got it and set an Alias for ls in my root folder. He set it to 'yes NeverGonnaGiveYouUp'. So now when im in my root folder and type ls I get an infinite loop ...
26
votes
6answers
15k views

How can I create an alias for a git [action] command (which includes spaces)?

Most of my my aliases are of this form: alias p='pwd' I want to alias git commit so that it does git commit -v But trying to create an alias with a space gives an error: $ alias 'git commit'='git ...
25
votes
15answers
5k views

What customizations have you done on your shell profile to increase productivity?

I know some people have some startup scripts and some people personalise the prompt. One developer uses short aliases for the long path he often visits and the frequent commands he runs. What are all ...
24
votes
4answers
9k views

Share aliases and PATH setting between zsh and bash

The shell that I normally use is zsh. I have several aliases to enable color in some programs such as ls and grep. I've also set my custom path so that I can execute programs in non-standard place (...
24
votes
3answers
28k views

l, ls & la — what are the differences, and are there more of these commands?

So, through typing several commands I've found that there's not only ls, but l and la too. There doesn't appear to be any man entries on Ubuntu 12.14. They all appear to do similar things with minor ...
24
votes
2answers
1k views

Grep alias - line numbers unless it's in a pipeline

I want to create a bash alias for grep that adds line numbers: alias grep='grep -n' But that, of course, adds line numbers to pipelines as well. Most of the time (and no exceptions come to mind) I ...
24
votes
2answers
1k views

How to make the zsh “correct” functionality remember my spell-correction decisions

I have enabled correction (I wouldn't call it autocorrection specifically because of this issue) in zsh by enabling setopt correct in my .zshrc. Now, when I type dtae in a terminal, I get: dtae ...
23
votes
1answer
11k views

Alias a command to run in the background

I'd like a keyboard shortcut to work as so: > e foo.txt to expand as > emacs foo.txt & It's simple to use alias e=emacs, but how do I insert the & after the filename? I realize it ...
22
votes
2answers
37k views

How to reset a shell environment?

This issue has been bugging me for a while, and although I've thought I've found my answer through EnvWatcher, unfortunately it only works on Bash. And I use zsh. I would like to replicate the things ...
21
votes
4answers
19k views

How can I tell what command an alias stands for?

ll is a common alias in many Linux distros. How can I tell what it aliases to? I've tried checking my .bashrc, but I am not able tell what ll is equivalent to.
21
votes
4answers
9k views

Why does sudo ignore aliases?

I am running Ubuntu 10.04 and I use upstart for daemon management. My enterprise application is run as a daemon and must be run as root because of various privileges. E.g.: sudo start my-...
21
votes
4answers
3k views

Automatically detect when I typed “vi” but meant “cd”?

About 5 times a day, I type "vi" when I meant "cd", and end up opening a directory in vi. It's making me NUTS. It seems like there should be a way to detect when I type in "vi + directory" and ...
20
votes
4answers
17k views

Is it possible to include file in config file of zsh? How?

I'd like to have a file eg. f with only zsh aliases (pureness reasons). Then I'd like to include f file in my .zshrc file, so that the aliases defined in f are visible in .zshrc. Is it possible? If ...
20
votes
1answer
4k views

how to find file defining an alias

I am having a problem I'm not sure how to get around. Somehwhere on my system, I have an alias defined as such: alias subl=\''/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl'\' I ...
20
votes
2answers
10k views

Is a symbolic/soft link similar to a shortcut/alias on a desktop?

It sounds to me like the basic idea of soft/symbolic links compared to shortcuts (on a PC) or aliases (on a Mac) are the same thing. Am I way off? Are they similar?
19
votes
6answers
4k views

Why is aliasing over standard commands not recommended?

For example, a common alias I've seen in the ~/.bashrc file (or equivalents) is alias rm='rm -i' However, I've seen people recommend against this because the alias might not exist on another system ...
17
votes
3answers
9k views

How do I temporarily bypass an alias in tcsh?

I am using tcsh. bash and zsh and other suggestions won't help here. I have several aliases that are named the same thing as another command, so if I did unalias it, typing the same thing would now ...
17
votes
2answers
961 views

How to retrieve lost aliases?

I made an echo command to my .bash_aliases file and erased all of my aliases, except the test alias. However, I still have a session open that has the aliases loaded (into the tcl?). Can I retrieve ...
16
votes
2answers
6k views

Change directory without typing cd?

Is it possible to make bash change directory in command line simply by typing that directory without any commands like cd? For example is it possible instead of writing this: $ cd /tmp I just want ...
16
votes
3answers
6k views

How to test if command is alias, function or binary?

I have command foo, how can I know if it's binary, a function or alias?
16
votes
5answers
10k views

How to set an alias on a per-directory basis?

Suppose you have an alias go, but want it to do different things in different directories? In one directory it should run cmd1, but in another directory it should run cmd2 By the way, I have an ...
14
votes
4answers
4k views

Would globally aliasing the fork bomb prevent its execution?

If you were to globally set alias ':(){ :|:& };:'='echo fork bomb averted' would that be an effective security strategy to avoid the Bash fork bomb execution or would there still be a way to ...
13
votes
2answers
14k views

Alias and functions

From the bash manual The rules concerning the definition and use of aliases are somewhat confusing. Bash always reads at least one complete line of input before executing any of the commands on ...
13
votes
1answer
3k views

Does one alias affect another alias?

I don't have many aliases set up in my .bash_aliases file just yet. Only recently have I discovered how useful they can be. I can see myself getting quite hooked on aliases so before the file gets ...
13
votes
1answer
956 views

Setting temporary bash aliases when entering a folder

Sometimes I like to have very customized bash aliases and maybe keybindings when I enter on a folder (can be a project where I'm used to type lots of commands from CLI). Lets suppose when I enter a ...
12
votes
5answers
2k views

How to test for possible conflicts while using alias in bashrc?

Is there a simple way to list all the command conflicts that have occurred in the system due to the bashrc update involving alias commands? For example, someone writes alias ls=/path/to/user-...
12
votes
3answers
4k views

Clear or disable aliases in zsh

I installed oh-my-zsh to make terminal use a bit easier. One thing that bugs me though is the prolific aliases added by it, like "ga", "gap", "gcmsg", "_", which are harder to remember than the ...
12
votes
3answers
5k views

Resolve all aliases in a zsh command line

I have nested aliases and I want to resolve all of them before executing the command. How do I do that? If there is a function that is not bound to any keys then M-x foobar is fine for me too. I ...
11
votes
3answers
1k views

How to extend bash aliases

How to create an alias that actually extends another alias of the same name in Bash? Why: I used to have GREP_OPTIONS set on .bashrc to something like this: GREP_OPTIONS="-I --exclude=\*~" I also ...
11
votes
2answers
3k views

How to document my custom bash functions and aliases?

Problem: I have multiple bash functions and aliases. I can't remember all of them off the top of my head, so I usually end up opening my .bash_functions and .bash_aliases files to find what I need. ...
11
votes
4answers
9k views

Non-interactive shell expand alias

I'm having trouble getting aliases to expand on my hosting account when I run a command like: ssh user@server "bash -c \"alias\"" My .bashrc file is: echo .bashrc # .bashrc shopt -s expand_aliases ...