    unset -f my_function

will remove (or unset) the function my_function

`unfunction my_function` in `zsh`

Perhaps, I&#39;m a bit late in this good old &#39;15, but this feature persists.

Well my macbook pro is kind of not cutting it for me anymore and I have a perfectly good Windows Laptop I would actually rather use but I cannot find a reliable replacement for my SQL client. So I am looking for a replacement for SequelPro for Windows.. 

Ones I have Tried and Either Didn&#39;t like or found a few issues with. 

Navicat - This one when left inactive for more than 15 minutes crashes.. I don&#39;t mind that it wants to disconnect but please do it gracefully with out locking up my system for a few minutes. 

SQLyog - Works well but I would like something with atleast a free for non-commercial use. I don&#39;t do any freelance and rarely do I do any of my &#39;work&#39; on my personal laptop. 


So does anyone have any suggestions?  

Sequel Pro Alternative for Windows

I recently upgraded from Snow Leopard to Lion and Xcode 4.1, and word jumping stopped working in both Terminal and iTerm2. Did the mappings change?

This is with *and* without a homebrew installation of `readline`.

My `.inputrc` looks like this:

    &quot;\e[1;5D&quot;: backward-word
    &quot;\e[1;5C&quot;: forward-word

Thanks!

Word jumping in iTerm2 or Terminal in OSX Lion

I&#39;m currently building a program which adds to the current user&#39;s shell depending on the project he&#39;s working on, by defining per-project aliases and functions. These aliases and functions may and will certainly have the same name like for instance `cdproj`, which would `cd` to the project&#39;s root.

I would like to remove previously defined aliases and functions when changing project (before (re)defining aliases and functions for the other project. I know I can remove an alias with `unalias` in both bash and zsh, but how would I do the same for a function?

Remove function definition (unalias equivalent)

<p>I'm currently building a program which adds to the current user's shell depending on the project he's working on, by defining per-project aliases and functions. These aliases and functions may and will certainly have the same name like for instance <code>cdproj</code>, which would <code>cd</code> to the project's root.</p>
<p>I would like to remove previously defined aliases and functions when changing project (before (re)defining aliases and functions for the other project. I know I can remove an alias with <code>unalias</code> in both bash and zsh, but how would I do the same for a function?</p>


I have an application that only works properly when called from a windows command prompt. Something to do with the input/output streams.

So I can call it from a bash script by passing it as an argument to cmd.

cmd /c &quot;badapp&quot;   

This works fine - but occasionally badapp fails with network problems - and I get no feedback. Is there anyway to check the ERRORLEVEl from the bash script - or see the output from badapp on the terminal running the bash script? 

accessing ERRORLEVEL from bash script

I know I can test for an empty string in Bash with `-z` like so:

    if [[ -z $myvar ]]; then do_stuff; fi

but I see a lot of code written like:

    if [[ X&quot;&quot; = X&quot;$myvar&quot; ]]; then do_stuff; fi

Is that method more portable? Is it just historical cruft from before the days of `-z`? Is it for POSIX shells (even though I&#39;ve seen it used in scripts targeting `bash`)? Ready for my history/portability lesson.

----------

The same question was asked on Server Fault as [How to determine if a bash variable is empty?](https://serverfault.com/questions/7503/) but no one offered an explanation as to *why* you see code with the `X&quot;&quot;` stuff.


Test for empty string with X&quot;&quot;

I want to be able to use sed to take an input such as:

    C:\Windows\Folder\File.txt

to

    C:/Windows/Folder/File.txt

Use sed to replace all backslashes with forward slashes

I have a shell script in which I wrap a command (mvn clean install), to redirect the output  to a logfile. 

    #!/bin/bash
    ...
    mvn clean install $@ | tee $logfile
    echo $? # Does not show the return code of mvn clean install

Now if `mvn clean install` fails with an error, I want my wrapper shell script also fail with that error. But since I&#39;m piping all the output to tee, I cannot access the return code of `mvn clean install`, so when I access `$?` afterwards, it&#39;s always 0 (since tee successes). 

I tried letting the command write the error output to a separate file and checking that afterwards, but the error output of mvn is always empty (seems like it only writes to stdout).

How can I preserve the return code of `mvn clean install` but still piping the output to a logfile?

Piping command output to tee but also save exit code of command

I am having a bash script which is something like following,

    cat filename | while read line
    do
        read input;
        echo $input;
    done

but this is clearly not giving me the right output as when I do read in the while loop it tries to read from the file filename because of the possible I/O redirection.

Any other way of doing the same?

Read user input inside a loop

I&#39;m trying to learn shell scripting, and I need to understand someone else&#39;s code. What is the `$?` variable hold? I can&#39;t Google search the answer because they block punctuation characters.

What is the $? (dollar question mark) variable in shell scripting?

&gt;Write a simple script that will automatically rename a number of files. As an example we want the file *001.jpg renamed to user defined string + 001.jpg (ex: MyVacation20110725_001.jpg) The usage for this script is to get the digital camera photos to have file names that make some sense.

I need to write a shell script for this. Can someone suggest how to begin?

Rename multiple files by replacing a particular pattern in the filenames using a shell script

I want to differentiate the STDOUT and STDERR messages in my terminal.
If a script or command is printing a message in terminal I want to differentiate by colors; is it possible?

(E.g. stderr font color is red, and stdout font color is blue.)

Example (using bold):

&gt; `$date`  
&gt; `Wed Jul 27 12:36:50 IST 2011`
&gt;
&gt; `$datee`  
&gt; **`bash: datee: command not found`**
&gt;
&gt; `$alias ls`  
&gt; `alias ls=&#39;ls --color=auto -F&#39;`
&gt;
&gt; `$aliass ls`  
&gt; **`bash: aliass: command not found`**



How to set font color for STDOUT and STDERR

Let&#39;s say I ran a command using a zsh

`echo &quot;mysecret&quot; &gt; file`

I can easily print the history including the entry numbers using the command `fc -l`:

&gt;     1  echo &quot;mysecret&quot; &gt;| file

But how can I easily delete an entry from the history?

I cannot find a corresponding paragraph in **man zshbuiltins**.

How to remove an entry from the history in ZSH

As far as I can tell, variable assignment is the same whether it is or is not preceded by &quot;export&quot;. What&#39;s it for?

What does &quot;export&quot; do in shell programming?

I use `rvm` to manage different rubies and their gemsets. My shell is zsh with oh-my-zsh configured with basic settings. Enabled oh-my-zsh plugins are ruby, rails, osx, and git. Here&#39;s the command I used to install ruby-1.8.7 and rails-3.0.7.

    rvm install 1.8.7
    rvm use 1.8.7
    gem install rails -v=3.0.7

and then I typed `rails` and got:

    Rails is not currently installed on this system. To get the latest version, simply type:

        $ sudo gem install rails

    You can then rerun your &quot;rails&quot; command.

I&#39;ve tried more thorough installs also, Like reinstall `rubygems` after switching to ruby-1.8.7, or create a completely new gemset, but with no luck.

Here&#39;s the rvm info:


    ruby-1.8.7-p352@rails:
    
      system:
        uname:       &quot;Darwin yicai.local 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun  7 16:32:41 PDT 2011; root:xnu-1504.15.3~1/RELEASE_X86_64 x86_64&quot;
        bash:        &quot;/bin/bash =&gt; GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin10.0)&quot;
        zsh:         &quot;/bin/zsh =&gt; zsh 4.3.9 (i386-apple-darwin10.0)&quot;
    
      rvm:
        version:      &quot;rvm 1.8.6 by Wayne E. Seguin (wayneeseguin@gmail.com) [https://rvm.beginrescueend.com/]&quot;
    
      ruby:
        interpreter:  &quot;ruby&quot;
        version:      &quot;1.8.7&quot;
        date:         &quot;2011-06-30&quot;
        platform:     &quot;i686-darwin10.8.0&quot;
        patchlevel:   &quot;2011-06-30 patchlevel 352&quot;
        full_version: &quot;ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-darwin10.8.0]&quot;
    
      homes:
        gem:          &quot;/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails&quot;
        ruby:         &quot;/Users/nil/.rvm/rubies/ruby-1.8.7-p352&quot;
    
      binaries:
        ruby:         &quot;/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/ruby&quot;
        irb:          &quot;/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/irb&quot;
        gem:          &quot;/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/gem&quot;
        rake:         &quot;/Users/nil/.rvm/bin/rake&quot;
    
      environment:
        PATH:         &quot;/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails/bin:/Users/nil/.rvm/gems/ruby-1.8.7-p352@global/bin:/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin:/Users/nil/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/sbin&quot;
        GEM_HOME:     &quot;/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails&quot;
        GEM_PATH:     &quot;/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails:/Users/nil/.rvm/gems/ruby-1.8.7-p352@global&quot;
        MY_RUBY_HOME: &quot;/Users/nil/.rvm/rubies/ruby-1.8.7-p352&quot;
        IRBRC:        &quot;/Users/nil/.rvm/rubies/ruby-1.8.7-p352/.irbrc&quot;
        RUBYOPT:      &quot;&quot;
        gemset:       &quot;rails&quot;
    
and the gem version is 1.8.10, the latest.

Rails keeps telling me that it&#39;s not currently installed

I&#39;m using zsh with the [oh-my-zsh](https://github.com/robbyrussell/oh-my-zsh) framework of Robby Russell. How can I create a shortcut or something to repeat the last part of a command?

for example, if I type:

    mv something in/this/difficult/to/type/directory

is there any way to easily get this: in/this/difficult/to/type/directory?

How to repeat the last part of a previous command?

I&#39;m running Ubuntu 11.04. I installed the [Terminator Terminal Emulator][1] 0.95, and Zsh, version 4.3.15. &lt;br/&gt;
I have (commonly known) problems with my keys inside the Zsh. At least these:

 - Home/End, nothing happens
 - Insert/Delete/PageUp/PageDown: a &quot;~&quot; is typed

I already tried some configurations for .zshrc which should solve the problem, but no approach really worked so far. Maybe this is related to the combination of Terminator and Zsh. I took the 2 configs on this page: https://bbs.archlinux.org/viewtopic.php?pid=428669. 


Does oneone have a similar configuration (especially Terminator and Zsh) and figured out what needs to be inserted into the .zshrc to fix the key settings?

 


  [1]: http://software.jessies.org/terminator/

Content Type	Original Author	Original Content on Stackoverflow
Question	greg0ire	View Question on Stackoverflow
Solution 1 - Bash	ennuikiller	View Answer on Stackoverflow
Solution 2 - Bash	theoden8	View Answer on Stackoverflow

Remove function definition (unalias equivalent)

Bash Problem Overview

Bash Solutions

Solution 1 - Bash

Solution 2 - Bash

Word jumping in iTerm2 or Terminal in OSX Lion

Sequel Pro Alternative for Windows

Attributions