Questions about the command line and other Unix-like aspects of Mac OS X, including the Mach/BSD-based kernel and FreeBSD-based userland. You may want to consider using Ask Different instead.

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How to copy recursively and change file names to be unique

I have a large tree containing a lot of photos on an external drive that was formatted with one of the linux filesystem types (don't remember which one). It's mounted on my mac and I'm trying to copy ...
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3answers
6k views

Fork bomb on a Mac?

I just learned about a fork bomb, an interesting type of a denial of service attack. Wikipedia (and a few other places) suggest using :(){ :|:& };: on UNIX machines to fork the process an infine ...
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2answers
75 views

Mac OS X how to verify particular packages are installed

In a BASH script I need to check if gcc, g++, cpp, make, libpng devel, zlib devel, git, Java (including devel files), ant and pkg-config are available on Mac OS X and if not, I need to prompt user to ...
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1answer
3k views

Move position of an application window from the command line on OSX

An application — iA Writer — somehow got stuck off screen with only the corner showing. I can't grab it or use other means to move it from that position. All new windows open in that position, ...
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4answers
8k views

How can I check if mysql is installed using a bash script?

I need to check if mysql is installed from within a bash script. What would be an efficient way of doing that? I thought I could do this: if [ ! -f `which mysql` ] ; then echo "foo" fi But I ...
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1answer
654 views

Icon not showing in applications on OSX

I just re-installed Firefox, but the thumbnail is not showing in the dock applications folder. The icon DOES show both in dock and in finder. I have tried to re-install Firefox again but without ...
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1answer
2k views

Printing the current date/time with sub-second precision

GNU date(1) understands the %N format spec, which outputs nanoseconds, so: $ date +%H:%M:%S.%N outputs 19:10:03.725196000 BSD date doesn't understand %N. How can I print the current time with ...
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1answer
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Mac OS X Darwin: how to reset admin password?

Today I bought an ibook G4 from a garage sale. The people who sold it to me didn't know the password for the 2 accounts on it. Apparently it was the guys late father's laptop. Any suggestions on how ...
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3answers
9k views

Unix mail command not sending email

I'm having trouble trying to send email with the unix mail command. Currently I'm trying this: echo "something" | mail -s "test mail" email@address.com But when I check my email, I haven't received ...
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1answer
72 views

Is there a way to integrate the unix “man pages” into OSX's Dictionary app?

I was thinking it would be cool to be able to look things up in the man pages the same way one looks up words with the "Dictionary" app. Is there a way to add the man pages that OSX supplies into ...
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1answer
757 views

Routing Tables: What is the effect of the RTF_IFSCOPE flag?

(Related to this question I posted a while ago on apple.stackexchange.) What is the difference between the following two routing table entries: default E.F.G.H UGSc 0 ...
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1answer
517 views

Sending raw video stream over network to an encoder

I'm trying to build a setup using OS X machines for streaming live video. Currently I use Flash Media Live Encoder on the same machine that is handling the video input unfortunately because FMLE uses ...
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5answers
125 views

Tool to compare files on one disk with registry information on another?

Been a long time since I got very far under the hood in Unix so I'm probably not even using proper terminology when I say 'registry,' but here's the situation. I have a disk thats dying. Lots of i/o ...
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2answers
535 views

Installing gcc without root?

I'm running OSX, and I don't have root, or an existing compiler. Is there any way I can install gcc? Are there official or trusted unofficial mach-o binaries that can be downloaded for a certain ...
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votes
4answers
251 views

Restrict search of locate to specific directories

Is there a way to restrict locate output to specific directories on Mac OS X Snow Leopard? I read about using regex on a Ubuntu forum. However, on my mac locate does not accept -r option. I also ...
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1answer
1k views

Running vim on a remote Linux machine “freezes” OS X SSH connection

(cross-posted this from SuperUser as the question seems more relevant to this audience) I am attempting to SSH to a Linux (Fedora 14) machine and then open up vim to edit a file, however on my new ...
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1answer
710 views

Bind unprivileged application to privileged port on Mac OS X

I'd like to create launchd.plist file for an httpd server. Problem is - when the httpd is run as privileged user it daemonizes, which is not allowed by launchd.plist manual page. If I don't run it as ...
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0answers
61 views

rm -rf ~/.Trash/* doesn't work, Mail Attachment.eml:OECustomProperty unable remove

I'm on OSX10.10.3, I've had a file in my trash for about 6 months or so. I have a file in my trash, 2 actually. That are from my mail cache that I dumped since I don't have the space on my SSD for my ...
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0answers
74 views

Disable networking only inside of a single terminal

I want to run a command in the terminal to disable networking, just in that terminal. How can that be accomplished? I'm running OSX. Note: I only want to disable the networking in that terminal. ...
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0answers
1k views

Can't figure out why ssh_exchange_identification: Connection closed by remote host appear

At home, I have setup a Raspberry Pi with the latest version of Raspbian and with ssh enabled. I also use a Mac Book Pro with OS X 10.9.3. I use ssh pi@192.168.0.22 to do some work on the Raspberry ...
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0answers
75 views

OS X-like deadkeys behavior on Linux

I'm on Debian (actually Crunchbang), and my notebook has a default US layout keyboard. My native language is Brazilian Portuguese (pt-BR), so I've changed my layout with setxkbmap -layout us -variant ...
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1answer
255 views

Diacritics do not work in GTK+ applications running on Mac OS X Snow Leopard

I am using some GTK+ applications in Mac OS X Snow Leopard. My MacBook is configured for using the Brazilian layout, which allows it to enter diacritics as dead keys (so I can write á typing ' and ...
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4answers
21k views

How to put Mac OS X wireless adapter in monitor mode

I'm searching for a equivalent of "iwconfig eth0 mode Monitor" in Mac OS. From man iwconfig mode Monitor does the following: "the node is not associated with any cell and passively monitor all ...
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2answers
8k views

Bypass ssh password prompt from a shell script

I've got a shell script that ssh'es into a server using public key authentication and runs a command on that machine. This works fine on machines where the users have installed the public key on the ...
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2answers
647 views

Accessing a remote OSX system from OSX, Linux, Windows

Is it possible to connect to a remote OSX machine using OSX, Linux or Windows in a way similar to Windows' remote desktop?
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3answers
109 views

Run fgrep multicore mac os x

I'm running this command on my Mac OS X on 8 cores: for i in $(cat file1);do grep "$i" file2; done > output.txt My file2 is 9 million lines so it takes a lot of time. Is it possible to use all ...
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2answers
3k views

How do I parse namespaces from an XML file using XMLLINT and BASH

Below I have an example of an Adobe XML swidtag used to track inventory. I need to parse out relevant information using xmllint in bash and output that to a new text file. For example I would like ...
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2answers
553 views

Total in `ls -l`

When I run ls -l, the following is displayed: >: ls -l total 320 -rw-r--r-- 1 foo staff 633 5 Apr 13:23 A.class -rw-r--r-- 1 foo staff 296 5 Apr 13:24 A.java ... What does the ...
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1answer
766 views

How do I fill my password automatically from .bash_profile when running command as sudo?

I know I could just put something like sudo mypassword in my .bash_profile, but I don't want to run every command as root. I want password to autofill under following circumstances: only the ...
3
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2answers
453 views

Mac OS X command-line tools - differences from FreeBSD

As I understand it many Mac OS X command-line tools (like ls, cp, chmod, chown etc.) are imported from FreeBSD. Which version of FreeBSD contains the command-line tools most compatible with the OS X ...
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3answers
745 views

Command line friendly virtual machine

I've been using Virtualbox for a while now, but the only way I've learned to interact with it is through the graphical interface. Is there a way for me to send bash commands to the vm through the ...
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4answers
426 views

Show video files with its size

I need all the .mp4 files' dimensions to be printed with the file name. For example: 1_VIDEO.mp4 1204x680
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1answer
640 views

bash find: get directory of found file

I have a parent folder named "parent_folder" with a lot of subfolders, in these subfolders is a file named "foo.mp4". I can find these files easily by doing this: mymacbook:parent_folder username$ ...
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3answers
137 views

Get modification date that can be used with touch -m

I need to get the modification date of a file so that I can set it on other files using touch -m. stat or perl -le 'print((stat shift)[9])' Didn't return what I wanted. I think that you are supposed ...
3
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2answers
19k views

How to install tar file (jhead) on Mac or Linux machine

I'm new to Linux and tar balls and was wondering how to properly install them on a Mac or Linux machine. I would prefer to know how to install on a mac but I just need some help understanding them. I ...
3
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1answer
114 views

Unix command equivalent for OS X Finder's Duplicate Exactly

What command can reproduce this function in bash? In Finder select File then press ⇧⌥ to make the command visible (⇧⌥⌘D). In AppleScript it's available as tell application "Finder" to duplicate ...
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3answers
66 views

Is swapping enabled by default on common operating systems?

As a result of this question, I was a bit confused. After some research I found that swapping is enabled by default on Mac OS X. Swapping was furthermore introduced in Windows 3.0, so I believe it is ...
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3answers
356 views

equivalent of `grep -a /dev/sda1` on Darwin?

I want to run something like % sudo grep -i -a 'some-string' <drive device> On Linux, <drive device> would be something like /dev/sda1. How can I find the equivalent on Darwin? (In ...
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3answers
651 views

Rename multiple files, sub directories, and insert characters at specific location on OSX

I have files and directories starting with "cateory-icon-" in many sub directories. I am trying to rename them recursively to "category-icons-". Please note that I added missing "g" to the category ...
3
votes
2answers
439 views

Make copies of a single directory to multiple directories with different names

I'm trying to replicate a single directory (with sub-directories) to a bunch of new directories based on a list. For example I can: mkdir Fred Barney Thelma Louise Foo Bar How would I copy a premade ...
3
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1answer
4k views

how to remove quarantine from file permissions in os x

I downloaded a .pem file and my Mac OS X (10.8.2) added an @ sign at the end of the file permissions. This is causing file permission issues. I can't seem to remove the quarantine flag. I even tried ...
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1answer
2k views

Mac OS X partition type problem

As a 2 decades of MS-Windows user I have switched to Mac OS X a month ago. And my knowledge is not enough to fix my big problem which I encountered yesterday and my brand new MBPro is dead now. I ...
3
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2answers
403 views

Am I using bash after this ordeal?

On Mountain Lion, host Coguaro, I login as user coconutpowder using bash: Coguaro:~ coconutpowder$ echo $0 -bash I need to run a command with elevated privileges so I try to su switch to root but ...
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3answers
3k views

Discovering the number of running and blocked processes in Mac OS X

In Linux, I could discover the number of running and blocked processes running grep "procs_running" /proc/stat and grep "procs_blocked" /proc/stat Is there a way to do it in Mac OS X? ...
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1answer
1k views

ZSH to auto-complete directories in command-line arguments?

Transferred from regular StackOverflow... I'm a new ZSH convert on OSX (git status in the prompt was my main driver to make the leap). Everything seems to be working swimmingly but I'm missing ...
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1answer
84 views

Edit a file via a script yet maintain the osx tags

On OSX you can have tags which allows you to identify different categories of files. Here are two text files with different tags when viewed in Finder: I have a large number of these files and have ...
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2answers
133 views

Multi-month view in calendar (cal) in OS X

I am hoping to run some of the commands listed in this article, e.g.: cal -3 which is supposed to show me the last month, this month, and next month. This command does not work in OS X. $ cal -3 ...
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3answers
152 views

For some IPs, ping -c 4 -W 1 ip | cat does not output anything until ping has finished, whereas it does for others

Why do $ ping -c 4 -W 1 127.0.0.1 | cat and $ ping -c 4 -W 1 1.1.1.1 print their output immediately, whereas $ ping -c 4 -W 1 1.1.1.1 | cat prints nothing for four seconds, then prints all ...
3
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1answer
445 views

How to change the default editor for a file type in Mac OSx?

The default editor for java files on my Mac seems to have been set to Xcode, but I want to change it to be the basic TextEditor. I've looked in preferences for the association, but it's not there. ...
3
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1answer
784 views

How to set the path OSX applications use

I'm running Mountain Lion 10.8.4, and have my environment all customized through ~/.profile so that when I run GUI apps like Sublime Text or Eclipse from the command line open /Applications/Sublime\ ...