A type of user interface for a computer. This can be both command line or graphical user interfaces. More commonly, shell often relates to the command line interface.

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124
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6answers
60k views

How can I trigger a Notification Center notification from an AppleScript or shell script?

I'd love to be able to take advantage of 10.8's Notification Center features in AppleScripts and shell scripts I write. Is there a built-in command or a third-party library I can use from either an ...
36
votes
4answers
63k views

Can I get the CPU temperature and fan speed from the command line in OS X?

Is there a command I can run from the command line in OS X to get the current CPU temperature and/or the fan speed(s)? To be more specific, I'd like to be able to get the same info available in the ...
34
votes
5answers
6k views

Is there a way to access a Mac's geolocation from terminal?

Some GUI apps use OS X location services, but I want to retrieve a Mac's physical location from the command line. This could be useful for running scripts, switching settings etc. The mechanism should ...
23
votes
2answers
42k views

Why Mac OS X don't source ~/.bashrc [duplicate]

I found a lot of people figuring out why instruction similar to this : Put X to your ~/.bashrc and you can do Y don't work. It always turns out that Mac OS X's bash's startup files (or Mac's ...
18
votes
2answers
13k views

Amending PATH so that /usr/local/bin is ahead of /usr/bin

I'm trying to install brew but get the following warning: Warning: /usr/bin occurs before /usr/local/bin This means that system-provided programs will be used instead of those provided by Homebrew. ...
16
votes
3answers
18k views

Run AppleScript from bash script

If I wanted to run an AppleScript from within a bash script I could call a file with the list of commands that I require to execute. #!/bin/bash {some commands} osascript file.scpt {other commands} ...
14
votes
2answers
7k views

How do I reset the scrollback in the terminal via a shell command?

When using Terminal.app, you can clear the screen by using the shell builtin clear or by pressing ^+L (Control-L). However, all this does is push the current screen content back one screen height ...
12
votes
4answers
10k views

Is it possible to run Nautilus on OS X?

Is it possible to run Nautilus instead of Finder on Mac OS X Snow Leopard? How?
11
votes
2answers
2k views

cd to a directory by typing its name?

For example if a directory 'blob' exists and I just type 'blob[return]' then the system cds into the blob directory for me. In Linux (Ubuntu) I can add shopt -s autocd to my .bashrc file, but on OS X ...
11
votes
2answers
2k views

Shell Script for Yesterday's Date

I'm trying to execute the following shellscript with hazel app on any file in the folder. It works, but the only thing thats causing a problem is the date for yesterday. #! /bin/bash saveDir="TJ" ...
10
votes
1answer
13k views

Bash or Zsh, what's the difference, why use one or the other?

So, the question pretty much says it all. I'm on Snow Leopard, and I do a lot of web development, particularly in Rails 3 which makes heavy use of the console. I've seen some notable bloggers etc. ...
9
votes
5answers
4k views

How to prevent Mac sleep from command line?

I have a long running script at the remote computer. I don't want terminate my ssh session, and need enter it into a shell script. How is it possible to prevent my Mac from falling into sleep from ...
9
votes
3answers
835 views

Where is a reasonable sed?

On Yosemite. The sed is old: does not understand \t for example. I installed coreutils and can not find any sed associated with same. What are my options here?
9
votes
3answers
12k views

Reset your PATH variable

I stuffed up (basically wiped) my PATH variable. Is there any way to reset it to the default? I look at How do I reset the $PATH variable on Mac OS X?, but I find it very confusing. As far as I ...
9
votes
1answer
414 views

Is it possible to set the output language of shell commands to anything other than English?

Am I correct in my assumption that shell commands such as cp, man, ls, etc. always print their messages in English regardless of system and user settings, and also standard shell messages like ...
8
votes
3answers
262 views

How can I automatically keep track of in-office hours when I connect to my office Wi-Fi?

I'm looking for a solution that starts a timer whenever I sign in to my office wifi and stops it when I've left. It should essentially log the hours I've spent at the office. I'm aware that there's ...
8
votes
2answers
6k views

What does -HUP do when used with killall?

Sometimes when I'm running a killall command from Terminal, a co-worker would suggest or edit my scripts to show killall -HUP. What does the -HUP part do?
7
votes
2answers
4k views

Change default shell from bash to zsh

I've tried to switch my default shell to zsh, using chsh: chsh -s /bin/zsh and: chsh -s `which zsh` Both commands ended with: Changing shell for adamatan. Password for adamatan: chsh: ...
7
votes
5answers
188 views

How to create an OSX Application to wrap a call to a shell script?

My goal is to include in a zip file what amounts to a shortcut, instead of telling my customer(s) to open up Terminal and run a shell script. My deployable essentially looks like this: $ unzip ...
7
votes
1answer
2k views

How can I format the output of ping in bash?

I am using the following script to cycle through a list of IP addresses and report back on the % of packet loss. I'd also like to have the IP address printed first, then its % of packet loss. But I ...
7
votes
1answer
117 views

How to “chroot” a terminal inside a DMG?

I'm doing security research and for that purpose I use an SHA-2 encrypted DMG to store the tools and files I work with (containing confidential client info), to protect them from forensic examination ...
7
votes
2answers
777 views

How to isolate processes that evoke insane mds_stores disk read activity?

I have an interesting situation where when I monitor my disk activity, I find that mds_store is continually running between 1 to 35 megabytes per second (averaging around 3-5 MB/s) on the read and ...
6
votes
2answers
2k views

Change my shell to a different bash version at /usr/local/bin/bash?

How can I set my /usr/local/bin/bash (which is the 4.2 version that allows auto-completion of 'cd to directory with directory name') to be my default bash for a new window instead of my regular ...
6
votes
4answers
1k views

Shell script to determine the file size in a folder recursively

Can anyone provide me with a shell script that I can run against various folders to see where large files are lurking? Many thanks
6
votes
2answers
1k views

Are Bash, Bourne, and Korn shells compiled into one binary in OSX?

On OSX 10.8, if you compare the binaries for bash, sh, and ksh, a few different shell options, they are the same size. If you take it further and cmp the binaries, there seems to be only a ...
6
votes
2answers
1k views

How can I have my shell always start in a certain directory that is not my home directory

I've tried putting cd /Users/my_name/my_directory/structure in both .bashrc and .bash_login but neither works, i.e. when I open a new terminal window I am in my home (/Users/my_name/) directory. ...
6
votes
3answers
3k views

Opening a terminal window to a specific directory from a bash script

How can I write a bash script in Mac OS X that opens a Terminal window in a specific directory? I'd assume something like: open /Applications/Utilities/Terminal.app But that does nothing (maybe ...
6
votes
2answers
3k views

How can I kill a process using top on OS X?

On other Unixe,s I can use top and then hit K and type the process ID. How can I do that in OS X? I can type kill [the_pid] on its own at the command line and that works. However, I was wondering if ...
6
votes
5answers
10k views

How to reset $PATH?

I was trying to add something to $PATH and it went totally wrong. I now can't run any commands such as ls. I've looked at this answer and used the following lines: ...
6
votes
2answers
238 views

How to automatically watch for file changes and perform a custom action inside shell?

For example, I'd like to automatically run YUI Compressor whenever I edit a JavaScript source file to output a compressed version. Ideally the process does not run in the background but in a ...
6
votes
1answer
252 views

“Libraries” (a la Windows 7) on OS X?

There's one feature from Windows 7 that I sort of like (yeah, yeah, I know...) and would like to implement (differently) on OS X. It's what they call "Libraries". It allows you to have the contents ...
5
votes
2answers
10k views

Editing System Preferences via Terminal

Am looking to edit system preferences settings via the command line but cannot for the life of me find the correct names of variables. In Login Options under Users & Groups, I would like to be ...
5
votes
3answers
2k views

open new terminal tab in the same directory with the active tab

In GNOME Terminal of Ubuntu when you open a new tab the new shell will automatically start you in the current working directory of the active tab shell. E.g. if in the active tab shell I am on ...
5
votes
4answers
2k views

My Automator Workflow fails because it fails to find the git command within the 'Run Shell Script' command? Need help

I have an Automator workflow and one of the actions is to clone a repository. Here's the code for the 'Run Shell Script' action. The command is run within the Bash shell /bin/bash if that matters: ...
5
votes
3answers
1k views

pbpaste, pbcopy using wrong pasteboard?

I'm converting a shell script which xclip and similar tools on Linux, to use pbpaste and pbcopy on Mac. The problem is the default pasteboard ('general' according to the man-page) for these tools is ...
5
votes
1answer
285 views

What is the relationship between `launchctl limit` and `ulimit`?

There is not any ulimit configuration in system startup files/ shell startup scripts. ulimit -a shows: -u: processes 1064 -n: file descriptors 256 launchctl ...
5
votes
1answer
442 views

How to isolate the most disk-active process(es) in OS X?

I have some process(es) performing a lot of drive access from time to time, however I've hitherto been unable to isolate which process or processes are performing the access. What shell command can I ...
5
votes
2answers
2k views

How to mount a RAM disk on startup?

I'm trying to mount a RAM disk on startup with this: /Users/Aram/Development/Tools/ramdisk.sh diskutil erasevolume HFS+ "RamDisk" `hdiutil attach -nomount ram://800000` com.aram.ramdisk.plist ...
4
votes
2answers
5k views

How can I temporarily suspend some users, hiding them from the login screen?

I have to manage a shared OSX workstation that is used by a rotating cast of characters throughout the year. The login screen quickly becomes cumbersome when users that aren't even around for a while ...
4
votes
4answers
6k views

Creating a virtual serial port

I'm trying to create a pair of virtual serial ports on my mac. This is fairly easy to do with many shareware programs on a PC. I figured there would be some uber-powerful shell command to do this in ...
4
votes
3answers
1k views

Running .NET binary with mono

When I have abc.exe generated from C#/Mono source, I use 'mono abc.exe'. Is there a way to run abc.exe with 'abc.exe' not 'mono abc.exe'? I mean, when I run 'abc.exe', can I make 'mono abc.exe' ...
4
votes
2answers
644 views

Pipe output of grep to a variable

I need to be able to write whether the test for a grep is either TRUE or FALSE to a variable so I can use it later For the following, if I run defaults read com.apple.Finder | grep ...
4
votes
1answer
11k views

How do I find what packages I've installed via terminal?

I've been learning the shell for a few weeks and have installed several packages. I know/remember what some of them are, like oh-my-zsh and emacs 24 (which was a nightmare to upgrade to), but not sure ...
4
votes
2answers
408 views

Make locator.updatedb run daily on Snow Leopard w/o hacking /System/Library?

On Snow Leopard, the locate database is updated once a week by a launchd job, /System/Library/LaunchDaemons/com.apple.locate.plist. I'd like to make the updater run daily, but AFAIK it's considered ...
4
votes
6answers
10k views

How can I write a script to open multiple terminal tabs and execute code in them?

I want to be able to open the terminal application and have it either automatically run a script that opens several tabs and run an arbitrary set of commands in each. For example I would like one tab ...
4
votes
2answers
977 views

Shell variable PROMPT_COMMAND not working as intended?

I want my bash prompt to change depending on external conditions. Here is excerpt from the bash manual: PROMPT_COMMAND: If set, the value is executed as a command prior to issuing each primary ...
4
votes
1answer
303 views

How do I set an icon for a directory via the CLI? [duplicate]

Possible Duplicate: Changing a file or folder icon using the Terminal This is a continuation of this thread from Super User. The question is how to set an icon on a directory. At first I ...
4
votes
1answer
2k views

Search through terminal history with up and down keys in OS X Lion

After I upgraded to OS X I am not able to use my ~/.inputrc bindings to search through the shell command history: # these allow you to start typing a command and # use the up/down arrow to auto ...
4
votes
1answer
428 views

How do I find where an environmental variable got set?

I installed a program to try it out, and decided I didn't like it so I moved the app to the trash. Today, in my shell, I noticed that there are a couple of PROGRAMNAME_BLAHBLAH environmental ...
4
votes
2answers
371 views

Is there a way to provide a sort order to an mdfind query?

In trying to get a list of all music files from a particular album using mdfind I see that the files aren't necessarily returned in any order. I'd prefer album/track order if possible, but can't find ...