UNIX is both the underlying code and architecture that makes up Mac OS X / iOS as well as a way of interacting with a Mac using the terminal app, X11 app, and various shells like `bash` or `zsh`. Whether you're logging into a mac using `ssh`, using `mdfind` or `tmutil` or using other open source ...

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6
votes
3answers
4k views

How can I manipulate several security settings from terminal?

I want to change these behaviors from terminal: Auto-login Showing password after screensaver and sleep mode Go to sleep mode after x minutes Enable screensaver after x minutes
20
votes
6answers
12k views

Is there a way to convert audio files in Mac OS X or the command line without using iTunes?

Now, I know I can use iTunes to convert music. But it's quite a pain.. All I'm asking is: Is there anything built into OS X or UNIX for converting files? Right now I simply want to convert .mp4 to ...
14
votes
5answers
2k views

Is there a native terminal in OS X, without having to load the desktop, window manager, etc? [duplicate]

FOr example, in linux you can boot to a terminal, you don't have to load a desktop, window manager, etc. Is there something like this in Mac OS X? And like in Linux, is it possible to switch to one of ...
3
votes
4answers
20k views

How do I delete a BootCamp partition using Terminal's diskutil?

For some reason, the BootCamp Assistant app won't let me delete my BootCamp partition. How can I do so using Terminal and the diskutil terminal app?
0
votes
1answer
43 views

how to find files with .j or .jp extension

I have some image files that have a messed up extension. The files are of the following format: "filename." "filename.j" "filename.jp" I need to find all these files which are in several folders and ...
1
vote
0answers
54 views

What is a “stuck” process?

Using the top command in Terminal, and ordering the list by state, I see a number of processes on Yosemite 10.10.1 whose state is stuck. I've looked through man ps and man top for an explanation, and ...
3
votes
1answer
309 views

how to get ls to list files in case-insensitive order?

How do I get the ls shell command to list my files in: case-insensitive order with the directories at the top? The reason I ask is: I want Aquamacs Emacs dired to list my files and directories ...
0
votes
1answer
21 views

Did I really Install GIT 2.0.1?

I'm following instructions from http://coolestguidesontheplanet.com/install-update-latest-version-git-mac-osx-10-9-mavericks/ But when I type in "git --version", I'm seeing: git version 1.8.4 ...
8
votes
3answers
4k views

How do I change the time format used by ls command line on osx?

I want to make ls display time in ISO format (military format). How can I change this behavior? On Linux I knew that I could force ls to display time in long format by usin --full-time but this ...
2
votes
2answers
73 views

Auto-Update Script

I'm trying to get the Macs at my workplace all updating at a specific time. To do so, I'm running a bash script from a spare Macbook running OS X Server. I have one minor and one big issue with my ...
-2
votes
1answer
87 views

What is the wheel user group for?

The output of groups after sudo bash lists the following groups: wheel daemon kmem sys tty operator procview procmod everyone staff certusers localaccounts admin com.apple.sharepoint.group.2 ...
1
vote
1answer
26 views

difference between tty[p,r,s][N] and pts

$ ps -ef | grep tty | grep root | grep "-sh" root 25185 25184 0 Oct 14 ttyp4 0:00 -sh root 22998 22997 0 Oct 14 ttyp2 0:00 -sh root 25379 25378 0 Oct 13 ttyp0 0:00 -sh root 1709 ...
0
votes
2answers
36 views

To prevent Finder from showing .noindex files

I can restrict Finder searching files by adding .noindex -extension, this thread. However, I want hide those files in Finder search. How can you prevent Finder from showing .noindex -files?
1
vote
0answers
26 views

Simulating an event to wake my Mac

Events like EC.cause/GIGE/LIDO/OHC/PWRB/RTC/USB# can wake up a Mac. Is there a way to programatically simulate either of these ? WOL is out of the question as my machine doesn't support WOL on WiFi. ...
0
votes
3answers
104 views

Mavericks - I need to be notified when a wifi network becomes available

My university's wifi connection goes up at random times. It's faster, so I would want to be notified when it becomes available so that I can surf faster and I don't have to pay for mobile data that I ...
1
vote
1answer
473 views

How to download and install Darwin 13 OS in PC?

I've conducted a research on UNIX operating systems and found out that an experimental OS (Darwin) is used for development of the OSX; just like Fedora on Red Hat Enterprise Linux. Darwin OS has a ...
4
votes
2answers
6k 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 ...
0
votes
1answer
62 views

Completely restore root and home folder after many problems with Macports and Homebrew

I had a long day battling with installing a LAMP environment with Macports. I installed several things, had many problems, tried uninstalling them (not sure if I did), and on and on. Then, I tried ...
1
vote
1answer
26 views

How can I inspect the environment variables of a running process?

Is there some equivalent (CLI or GUI) to Linux's /proc/$PID/environ feature?
4
votes
4answers
9k views

How do I search all hidden files that are in hidden folders using Terminal?

I need to find some configs buried in some hidden folders and can't recall where they are to navigate to them directly Cmd+Shift+G. I did a sudo find -name Foo* (slow), but none of the returned files ...
0
votes
1answer
39 views

What does the @ sign and the number next to it mean in ls -l display?

I got the following output when I apply ls -l command in my Mac OS X Mavericks for an image file: I understand what does -rw-r--r-- mean. But what does the @ sign and the number next to it mean? Is ...
0
votes
1answer
27 views

Where is the documentation on /tmp?

I've read that /tmp will automatically have files deleted that are older than 7 days or upon restart, but I can't seem to find where this is documented. Can anyone point me to a man or web page from ...
0
votes
1answer
164 views

How to uninstall wget

I recently installed wget on my Mac using the instructions listed here: http://osxdaily.com/2012/05/22/install-wget-mac-os-x/ and lorcan's instructions here: How do I get "wget" for Snow ...
0
votes
0answers
40 views

How does one reverse engineer how the Finder performs an operation?

I'm trying to figure out how OS X implements it's secure empty trash operations and it seems like I should be able to get more finely grained information than what the process monitor tells me. The ...
6
votes
1answer
314 views

/usr/sbin/uninstall? What is it/what does it do?

There's a /usr/sbin/uninstall command on my system. What does it do? There is no man page, and running it says "You must be root to run this tool.", and (after sudo uninstall -h) it says "URL is ...
7
votes
6answers
690 views

How to prevent the application launched in Terminal from undesirably exiting?

I launch applications from the Terminal with commands like this one : /Applications/Mail.app/Contents/MacOS/Mail & The important part is the &. For Unix / Linux / Solaris : I have ...
1
vote
1answer
70 views

Error when mounting sparse bundle from terminal

I picked up this command on how to open a disk image and have the password prompt in the terminal window (useful for remote mounting):hdiutil attach -stdinpass /path/to/image source However, it's not ...
8
votes
1answer
3k views

What is standard for os x filesystem? e.g. /opt/ vs. /usr/

What does and should go into /opt/ and what should/does go into /usr/? My understanding is that /usr/ used to be for user home directories, but since that exists in /Users/ - what is the purpose now? ...
2
votes
1answer
173 views

Super and admin user in OS X

Superuser account is disabled by default in OS X (Mavericks). But if you run sudo -l you will come to know that the admin user can execute all superuser commands. Then what is the point of disabling ...
1
vote
4answers
3k views

How do you change your UID in OS X Mountain Lion

kimvais @ kimvais ~ $ id uid=501(kimvais) gid=20(staff) ...
9
votes
5answers
60k views

Copying ISO file to USB drive in OS X?

I have tried to copy an ISO file to a USB drive. I am unable to do it with Disk Utility. How can I copy the ISO file to a USB drive? But I get the below. I have enough space in the 16GB USB drive ...
1
vote
2answers
224 views

What is CUPS on port 631?

I recently ran an NMAP scan of my Mac's open ports and discovered port 631 (ipp) was open. Intrigued, I saw it was for the CUPS web interface, and after enabling it I found it had something to do with ...
2
votes
1answer
391 views

How does this complex BASH shell script work?

Apple Support Community member Linc Davis developed this command to aide in diagnosing issues. The output gives a general overview of one's system and is very similar to the program etrecheck. But, it ...
2
votes
1answer
99 views

Sending specific keys when using Remote Desktop UNIX commands

I would like to script the uninstallation and reinstallation of Profiles on a group of Networked Macs. In order to do this I shall use the UNIX Command part of Remote Desktop. When sending the ...
1
vote
4answers
11k views

Xcode for iPad?

I don't have an Apple computer, only iPad and Debian computer but I still would like to add a feature to iOS app here. Earlier I found out that I can download Xcode, more here, from Apple Store. Now I ...
1
vote
3answers
444 views

Sshfs or its substitute in Apple products?

I instructs my Apple friend to get Sshfs, i.e. to mount an outside target, to home -directory but he cannot find sshfs for Mac. Dose there exist some substitute or some Apple-compiled version for ...
0
votes
1answer
970 views

Whats the equivalent of the unix tree command on OSX

Whats the equivalent of the unix tree command on OSX (10.8.5)
0
votes
1answer
22 views

What is a CPX port or driver?

What is a CPX port? More specifically what is CPX as relates to a Datacard embossing printer? A buddy dropped off an ancient Datacard 150i embossing machine with me to see if I could get it working. ...
3
votes
1answer
177 views

Can't write to ~/Library, even though permissions look OK

I'm totally stumped on this one — a Macbook Air, 10.9.2. As far as I can tell, I should be able to write to my Library directory. Everything I can see suggests I should be able to: [njvack@zot ...
1
vote
1answer
60 views

grep doesn't give the correct offset?

Trying to get the bytes offset of a text word in a binary file (with some text here and there). I need to know the offset of this word from the beginning of the file. I'm wondering if on osx the ...
1
vote
1answer
104 views

Anyone knows how to view the nice value of a process under Mavericks?

Used to be able to view the UNIX nice value of a process in the top CLI utility. I think it's gone from the top utility on Mavericks? Any other ways to view it?
1
vote
1answer
19 views

How can I find a changelog of core utility versions in OS X?

I often research what utilities are available on different POSIX-like operating systems in the interest of portability, but I haven't been able to find a stable listing of what versions of various ...
0
votes
0answers
30 views

Convert absolute symlinks to relative ones?

I've seen plenty of threads on the Internet about doing the opposite, but what I want to do is, given a folder: /Lib/Foo/Bar.framework/Versions/1.5 And a symlink to it: ...
0
votes
2answers
176 views

how to configure Surfraw on OSX?

Has anyone had success configuring Surfraw on OSX? How do I get a working configuration for OSX? http://www.surfraw.org/
8
votes
2answers
264 views

Piping multiple commands

I would like to run the following command and pipe stout of both to TextEdit: pmset -g; echo; pmset -g assertions | open -f -a TextEdit This doesn't work, it only executes the latter: How?
4
votes
0answers
74 views

Why is Terminal.app corrupting my tcsh history?

I've had an ongoing problem that appears to be specific to OS X and Terminal.app: periodically, I get garbage in my tcsh history that looks like this: ^[[1m^[[4mcomputername:~/Code/emacs-source ( ...
0
votes
0answers
88 views

Latex xdvi Error

I am new to Unix and am trying to use LaTeX. I am having a problem with xdvi. Every time I try to use it I get the error message: Error: Can't open display: I have a mac and I have Xcode installed. ...
0
votes
1answer
231 views

ARD and dockutil?

This is probably a pretty noobish question, but here goes... I've recently discovered Kyle Crawford's dockutil, but I can't make it work with Apple Remote Desktop. Or rather: I can't make it work ...
5
votes
1answer
5k views

Sudo keeps asking for password, despite that NOPASSWD already set

The following sudoers configuration used to work well in MacOS 10.8.5, several days ago I upgraded to Mavericks, NOPASSWD flag does not seem to work anymore: # User privilege specification root ...
7
votes
2answers
164 views

Where are all of the command line tools installed?

I was playing around to set up a prober working/development environment. I installed command line tools such as: NodeJS NPM Grunt Bower Where can I find those tools and how can I delete them? Is ...