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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2answers
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Key mappings in Linux

What do people mean when they point out that the "keys are not properly mapped" in a Linux installation when working on the command line? Isn't the default installation OK? What extra/specific ...
21
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3answers
164k views

How to install apt-get or YUM on Mac OS X

I am new to Mac OS command line, I want to use either of apt-get or yum. Can anyone help me to install them and make them successful running?
2
votes
1answer
223 views

Is it alright to have two PATH variables in .bash_profile

I am trying to setup Metasploit on osx 10.7, but I need to edit my .bash_profile and I noticed something unusual to me. I have been reading about setting the environment variable on http://linux.die....
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vote
1answer
155 views

ipfw on Mac OS X 10.8

I'm trying to setup local transparent proxy with ipfw and squid and ran into some problems. I have a single rule 00100 fwd 127.0.0.1,3128 log tcp from any to any dst-port 80 but it either gets into ...
0
votes
1answer
482 views

MAC bash commands stop working properly

I was trying to install some stuff for scala development on my MAC, and probably I managed broke the shell/terminal while I was mindlessly running some scripts that I don't know. Now when I start the ...
2
votes
0answers
215 views

Shorter timeout on I/O errors MacOS X

How do you set a shorter timeout value for read/write I/O errors on MacOSX? We tend to get a few semicrashed disks and want to rsync the contents to a secure location, but when the file subsystem ...
5
votes
2answers
12k views

A simpler way of comparing md5 checksum?

After downloading a file that has a md5 checksum available I currently check it with md5 *file* | grep *given_checksum* e.g. md5 file.zip | grep -i B4460802B5853B7BB257FBF071EE4AE2 but it seemed ...
0
votes
2answers
2k views

Defragment a USB flash drive on Mac OS X

I frequently create bootable flash drives and many a time large files need to be defragmented in order to boot. On Windows I'd used Contig/WinContig, but I must use OS X for the same purpose now. Are ...
0
votes
1answer
470 views

Errors building XScreensaver for X11 (and dependencies) on Mac

I'm building XScreensaver (the X11 version) on Mac OSX and I get the following errors while building/compiling it and its deps. XScreensaver terences-imac:xscreensaver-5.21 MAU$ make gcc -pedantic -...
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votes
2answers
1k views

Moving compiled assembly code to the boot sector of a USB device

I have written a simple operating system and I am trying to test it. I have VirtualBox installed and an eight GB flash drive, so I thought I would just use those. I am not sure how to make the USB ...
0
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1answer
235 views

Problem building GPG

I'm having a problem building GPG on my system; when I try to run make it fairly well before it suddenly bails out with an error. Here's my latest result from running it: make all-recursive Making ...
1
vote
1answer
305 views

Is Mac OS X really SUS compliant?

Internet says that Mac OS X 10.8 has achieved certification to The Open Group UNIX® 03 standard and that it is a compliant system. But a simple test with echo seems to indicate otherwise:  a) The ...
3
votes
1answer
3k views

sudo: unable to initialize PAM: No such file or directory

While trying to build the NumPy Python math module with Intel's Math Kernel Library (MKL) on OSX 10.8.3, I was running into some problems with the Accelerate and vecLib frameworks overriding the MKL. ...
3
votes
1answer
82 views

stat on an encrypted volume in osx takes a long time

My workstation is a MacBook Pro with an SSD. For security reasons, my main volume is encrypted. I ran this command on a folder: time find . -exec stat {} + >/dev/null real 0m5.205s user ...
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0answers
575 views

Convert ASCII-8BIT to UTF-8 using OSX' .bash_profile

When running certain rails scripts in OSX' Terminal, I get warnings such as the following: unable to convert "\xA9" from ASCII-8BIT to UTF-8 for tmp/cache/assets/CC7/4D0/sprockets%...
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votes
2answers
8k views

Checking if I can reach some ports from my computer

Is there a terminal command or something on OSX that I can use to test if I can reach some ports on a remote server? I know these ports are reachable on that server, because I can access them from ...
1
vote
1answer
1k views

Safe to change owner of OS X system folders?

I'm trying to get Homebrew to work. That program's diagnosis tool gives me these suggestions: You should probably chown /usr/local/etc ... You should probably chown them: /usr/local/...
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0answers
549 views

Why does my Mountain Lion computer have Apache 2.2.22 shut down almost as soon as it starts?

[Sun Apr 21 17:29:00 2013] [notice] caught SIGTERM, shutting down [Sun Apr 21 17:30:15 2013] [warn] Init: Session Cache is not configured [hint: SSLSessionCache] httpd: Could not reliably determine ...
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votes
3answers
2k views

default wordsize in UNIX/Linux

I was inspecting the preprocessed output of my C program and happened to look at the header file wordsize.h It is located in /usr/include/i386-linux-gnu/bits/wordsize.h the file contains only one ...
3
votes
2answers
36k 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 ...
0
votes
2answers
593 views

Calendar.vim E492: Not an editor command: Calendar

I am trying to install the calendar.vim plugin on mac osx snow leopard running gvim. I have pathogen.vim installed, so I followed the instructions on github to install calendar.vim from the terminal: ...
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0answers
349 views

Installing required libs/frameworks/packages for compilation on OSX

I'm trying to compile SmartSim for OSX Lion, and at the moment I'm at the ./configure stage. Here is a dump of what I've managed to get so far: $ ./configure checking for a BSD-compatible install... ...
1
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1answer
99 views

Losing smtp/pop3/imap access

I have a server running OS X. This server connects to another server, this other one CentOS 6.3, from times to times to collect mail messages over POP3/IMAP and also to send mails using SMTP (exim, on ...
3
votes
2answers
210 views

“or” in shell glob

I want to ls the files containing the substring "s1r", "s2r", "s3r" or "s19r" in their filenames. I'm almost there! Botched attempts: ls *s[123][9?]r* The above gives me only files including the ...
0
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1answer
874 views

How to map terminal shortcut from CTRL-M to another combination

I read in another post that you can type CtrlJ or CtrlM instead of the Return key in the terminal, which is great. But what I want to be able to do, is change that to another combination, for example: ...
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2answers
8k views

Unix vs Mac OS X, Notable Difference

I was searching Unix vs OS X. I found a notable difference at From http://www.unix.com/unix-dummies-questions-answers/919-mac-osx-vs-unix.html OS X is a evolutionary kernel from the MACH and BSD ...
5
votes
1answer
366 views

Execute multiple bash commands on the output of find

I want to execute some commands using the find -exec option, but I'm not sure what' wrong with this code. Currently, it's only processing the first find result, then getting stuck. I'm using bash in ...
0
votes
1answer
103 views

Files replaced with Finder on Mac creating a copy on Samba's .recycle

Scenario: Ad Agency with Samba Server and multiple Mac users, 0 Windows users. vfs objects = recycle recycle:keeptree = yes recycle:repository = /storage/files/.recycle/%U Workflow: Before start ...
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vote
1answer
75 views

mpg321 doesn't autoplay songs

I'm using mpg321 on OSX and I just try to play my songs with mpg321 *.mp3. It plays fine but doesn't play the next song automatically. I have to press some key for it to play which is kind of ...
3
votes
4answers
5k views

How to troubleshoot failed X11 forwarding with ssh?

When I try to establish an X11-forwarding connection to myserver, I get the following error: % ssh -X myserver xlogo X11 connection rejected because of wrong authentication. X11 connection rejected ...
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0answers
264 views

Rsync seems to back up files that haven't been opened or changed

I have started using rsync to back some data on my mac to an external HD. It works really well, but I have noticed something odd. Every time I run the command, I get a list of files that haven't been ...
5
votes
0answers
1k views

A real non-“better touch tools” solution for select-to-copy on Mac OS X

I recently moved to Mac. I am missing my X11 copy-paste style. I can't find a way to exactly emulate X11 behavior "select-to-copy", "middle-click-to-paste" globally on Mac OS X. I am aware that this ...
5
votes
2answers
2k views

remove duplicate files

On my Mac OS X 10.6.7, iTunes duplicated every single file in my music library. Now I have 3,840 files instead of 1,920. The problem is that iTunes didn't simply duplicate the whole folder, but each ...
5
votes
3answers
14k 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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vote
2answers
191 views

Keep the ssh session

I am using Macbook developing a client application. I want to access server logs, so I opened a shell terminal and established a ssh connection to the server and access the log file there by ...
5
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3answers
3k views

Transferring Files SSH SCP Error Message: 'Stdin: is not a tty'

I am using a Macbook SSH terminal and generated RSA key pairs and uploaded remote id_rsa.pub with approved permissions. I can connect with remote Apache web server. I can create, open, move, modify ...
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votes
1answer
149 views

Why is ./filename required to run executable script? [duplicate]

After creating a Python script file, test.py, in my home directory, and running chmod +x test.py to make it executable, and placing #!usr/bin/env as the file header, I expected to be able to run the ...
0
votes
1answer
532 views

Can't use peewee on Mac OS X Mountain Lion

I am getting an error when I run Python programs that imports peewee: ImportError: No module named peewee The same program works fine under Ubuntu 12.04. I used pip to install peewee, and it ...
2
votes
1answer
432 views

Find out where $PATH got corrupted

I'm using OSX Mountain Lion 10.8.2 $echo $PATH prints this: /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/Users/myusername/.rvm/bin I've commented out everything in ~/.bash_profile ...
3
votes
2answers
752 views

A bunch of files have 777 permissions

I have been learning Python and Bash scripting, and I up to now I have given my scripts 777 permissions. Having learned more about how to set permissions, and knowing this is a bad idea, I ran the ...
0
votes
1answer
5k views

Cannot execute binary file on Mac OS X Lion 10.7.5

I want to execute phylocon on a mac OS X lion but after changing the path and making the file executable, I get the error 'cannot execute binary file'. But the steps that I took to running the command ...
2
votes
2answers
2k views

OS X setting environment variables

I have OSX 10.8.2 with ZSH as my shell and iTerm as a terminal (don't know if the last thing is relevant). I have to mention that I'm relatively new to OSX. I'm trying to set up some environment ...
4
votes
1answer
563 views

zsh completion: getting file names from a specific directory

OK, a little background: I use a Mac, and I do as much as possible in the CLI. In particular, I frequently pop in a USB stick, cp or mv a file over, and then immediately wish to eject (unmount and ...
32
votes
1answer
6k views

git diff displays colors incorrectly

In order to get coloured output from all git commands, I set the following: git config --global color.ui true However, this produces an output like this for git diff, git log whereas commands ...
3
votes
1answer
258 views

IPFW Port Forwarding

This is my situation: I want to connect to an OpenVPN server from my office (we're using a proxy, only ports 80 and 443 are allowed). Server IP address is: 176.31.250.232:843 My static IP address is:...
1
vote
1answer
48 views

How to revert to the original config files in OS X?

How can I revert config files in OS X 10.8.2 to their original state? I want to discard any changes made to /etc/hosts, /etc/sshd_config, etc.
3
votes
1answer
698 views

Tmux status bar question

I'm fairly new to tmux and to truly master and learn it, I decided to make myself a fresh .tmux.conf I was wondering, though, if it's possible to hide a path in the status bar. For example, I have ...
1
vote
2answers
2k views

Unix: find directory filenames listed in a text file and move to new directory

I'm a command line novice trying to figure out the appropriate command to execute the following within the Terminal in Mac OS X. Assuming I've placed all files in the same directory, I want to ...
2
votes
1answer
278 views

How are default permissions determined (on OS X)?

My (limited) understanding of basic Unix is that any files that are created will be created based on the permissions of the creating user. In particular, the group assigned will be the creating user's ...
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vote
2answers
76 views

What permissions should I set if I'm the only user?

I'm the only user on a OS X machine and am wondering what the best practice is for setting permissions on my sensitive files. Specifically, are there reasons to prefer one of the following -rw------- ...