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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1answer
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Unique lines based on the first field

How can you find unique lines or duplicate lines in a file based on the content of the first field, or the first n characters ? The uniq command on OS X lacks the -w switch that is available under ...
8
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1answer
2k views

Bash history with timestamps

I would like to keep timestamps on the commands logged in my Bash $HISTFILE, is it possible? I did not manage to set it up using man bash as an information source. My other options are as follows: ...
2
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1answer
1k views

Finding corrupted files

I have a directory that have zillions of files. As soon as I try to copy this directory, I receive a message that a file could not be copied (corrupt ?) and the copy stops. Is there any command I ...
2
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2answers
929 views

Quickly check whether many network hosts are up-and-running

Objective: check if a host is up-and-running on the network, with a method that can be efficiently parallelized over many hosts. Emphasis on a QUICK turnaround of the check. Reason to emphasise ...
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2answers
766 views

My computer won't shut off normally

Every time I try to shut down my iMac it just stays on that loading circle forever. The only way I can get it to shut down is by holding down the power button. I checked the system logs (below) and I ...
6
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2answers
9k views

Global bash_profile

I realize there are /etc/profile and /etc/bashrc files for setting global environment variables and maybe I'm just misunderstanding their purposes, but... Is there a global bash_profile file? I'm ...
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4answers
18k 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 ...
3
votes
1answer
1k views

Closing socket connection on running console application

I am testing a chat bot and want to gracefully handle for times when the chat server isn't running so it can come back up when the service is available again. I have the programming handled. My ...
3
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2answers
398 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 ...
3
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1answer
2k views

How to get wireless access point information from MacOS terminal

I'm trying to gather information about surrounding access points but can't find the right tools to do that. For Linux there are tools like iwconfig and iwlist, but it looks like they are not ...
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0answers
76 views

How to prevent ELinks from staying in scrollback buffer?

After quitting elinks, the browser page history is lingering in my scrollback buffer, and therefore not returning to whatever was buffered on screen when I launched elinks. Inside a GNU screen with ...
3
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1answer
14k views

access external hard drive to delete folder on terminal Mac

I want to delete a folder of portable hard drive on terminal in Mac. Are there any command line ?
3
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1answer
1k views

Connect to Webdav (https) with domain\user

I have a problem trying to connect with our network webdav share on mac osx. I can connect from windows, so it's working. On Mac OSX I have set the routes, and I can connect when using "Transmit" but ...
5
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1answer
1k views

Where to install applications

I'm a long-time Windows user in the middle of a multi-year personal migration to Linux-based development. On Windows when I installed an application it got put in the Program Files folder and I'd ...
5
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2answers
477 views

Zsh: Automatically modify executed command

I've recently installed grc (generic colorizer) to my system via MacPorts, giving me the ability to get colorized output for plenty of commands which by default don't support it (see screenshot ...
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2answers
4k views

Why the differences in color between SSH terminal sessions in OSX?

I'm trying to get the colors in an SSH terminal session with a CentOS machine to look the same as it does when I'm SSH'd into my Ubuntu server. If I run echo $TERM in both I get xterm-color as ...
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2answers
8k views

rsync “skipping non-regular file” when cloning my Aperture library

I am trying to use rsync to maintain a backup copy of my Aperture library. When I run the sync command to see what would happen this is the outcome: rsync --dry-run -r "/Volumes/Data/Aperture ...
10
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3answers
5k views

Why can't tr read from /dev/urandom on OSX?

A colleague suggested creating a random key via the following command: tr -dc A-Za-z0-9_\!\@\#\$\%\^\&\*\(\)-+= < /dev/urandom | head -c 32 | xargs It gave me the error: tr: Illegal byte ...
2
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0answers
1k views

IPSec VPN Debian Squeeze Server for Mac OS X

I'm trying to get an IPSec VPN set up on my Debian home server, so that I can access my home network and browse without having my internet filtered by my college network, and so that I can perform ...
2
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0answers
707 views

Finding/Mounting USB Device in Mac OS X 10.8

I've looked all over and found similar questions and answers and none seem to work for me or match what I see. I should add I'm new to UNIX and the OS X command line but have got a basic overview to ...
3
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2answers
1k views

List all chflags file flags?

Is there a way to see a file's flags, such as hidden, schg, etc? I've got an rwxrwxrwx file that I can't edit, and I think a flag might be responsible.
2
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0answers
218 views

Does HylaFax server run in OS X?

From their FAQ: HylaFAX is intended to run on any UNIX system that supports a particular set of features: FIFO special files, BSD-style sockets and the TCP/IP communication protocols, BSD-style ...
1
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1answer
404 views

Rsync keeps writing

I just recently updated my macbook pro to Mountain Lion. I use rsync to make backups of certain directories on my macbook pro my timecapsule wireless router with build-in harddisk. rsync -avzm ...
0
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1answer
462 views

Install of Gentoo: Can't find root device (boot of LiveCD from HardDrive)

I am attempting to install Gentoo on my PowerPC Mac. I have reached the point where I can boot the LiveCD (I have no CD Drive, so it is from my Hard Drive), but after the kernel is loaded, I get a ...
18
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4answers
1k views

Finding command execution time in hindsight

I've just executed a long-running process from the bash prompt. In hindsight, I wish I'd run time on it, or noted down the time at which I kicked it off. Is there any way of getting this information ...
5
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2answers
900 views

emacs - paste text from clipboard without formatting

I am using Emacs 24 for MacOSX and having some problem with pasting code from clipboard to Emacs. The code that I selected usually already nicely formatted (with tab, ident, ...). However, when I ...
5
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3answers
4k views

/etc/shadow on Mac

I've been trying to run this Linux passwd-generator file on my Mac. I modified enough the script to make it to work well with directories under OSX: #!/bin/sh # build-passwd.sh - creates a password ...
2
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1answer
610 views

Permissions corrupted?

A few weeks ago, I installed Linux Mint on a USB flash drive. I used it to copy the contents of my HFS+ external hard drive to my Windows drive on my desktop. Then, I formatted the external drive to ...
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3answers
111 views

Weird behaviour case insensitivity with bash on MacOS

~/testing $ echo Hello > hello.txt ~/testing $ echo Goodbye > goodbye.txt ~/testing $ cat goodbye.txt hello.txt > HELLO.txt ^C ~/testing $ ls -l total 9056 -rw-r--r-- 1 user user 8 ...
1
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1answer
750 views

How should I check to see if the remote smb serv is mounted?

I'm pretty new to mount. Basically, I have a remote SMB serv on the local network that I want copy images from a directory on, then repeat every 5 min. I think what I need to do is make a script that ...
1
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0answers
92 views

How do I fix my FastCGI Pinax / Django deployment?

I'm running OSX Lion (posted here because this is a Unix-specific question), and am trying to deploy a Pinax project via FCGI. I have the FastCGI daemon running: $ ps wwaux | grep fcgi jonathan ...
1
vote
1answer
230 views

How to prevent fs unmounting?

(Apologies in advance for giving so few details below, but trust me that the set-up and the problem I'm dealing with are truly baroque, and even a superficial description would result in a far ...
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3answers
3k views

How can I print well formatted code

Similar to using markdown on Stack Overflow to create monospace output, how can I do that for my programs. I tried lp filename.txt and was pleasantly please to find that it was able to use the local ...
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1answer
1k views

How can I force LXDE to have a transparent background when connecting with X/X11?

Just got my Raspberry Pi in the mail and I've started playing around with it. After getting LXDE up and working working in desktop mode (i.e. monitor and keyboard plugged in) I decided I wanted to ...
0
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1answer
164 views

Linux Mint freezes while downloading eclipse

I installed linux mint on parallels on my mac computer. It seemed to work fine and then, while downloading eclipse from Software Manager the entire system froze when it got to 40%. I've tried ...
3
votes
1answer
173 views

On OS X, how do I log in interactively as root starting from my normal user account?

I have been doing this for a while: sudo su - but it uses 'sh' rather than 'bash', which is what I'd like to do. Which command will log me in as root and get me a bash shell even if that's not the ...
2
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2answers
372 views

Bash Process Substitution does not work as 'root' on OS X

OS X 10.6.8, if I use Bash Process Substitution as 'root', it just doesn't work. Is it supposed to be so? Why? Note: here's what I mean... "<(list)" mysql -D robottinosino < <(echo ...
2
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0answers
486 views

How to fix link error under CMake for class QX11Info on Mac OS X

I'm trying to build kxstitch, which is designed for Linux, on OS X. I've gotten most of the way there by installing MacPorts, XCode, KDE, etc. and making minor changes to the build file, but am ...
1
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4answers
1k views

Best rolling release distribution for MacBook Pro

I got a macbook pro 7.1 wich is running OSX, i'm looking for the most compatible distribution to dual boot. Here's my criteria : I don't want to reinstall my system every 6 month, so I'll prefer a ...
1
vote
1answer
515 views

Automatically dim the backlight of a secondary monitor on MAC [closed]

I have a 2010 iMac 27" as well as a 27" Apple Cinema Display. The iMac will auto-dim on inactivity, I'd say around 5 minutes. When the iMac dim's the Cinema Display is still bright. There is no ...
2
votes
1answer
296 views

FTP timeout FIRST time [closed]

I'm using PureFTPd on MacOSX (Snow Leopard, not server version). When trying to access the FTP account from the outside via dyndns (e.g. using https://www.wormly.com/test_ftp_server) the connection ...
1
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2answers
1k views

How to bypass youtube's local cache?

Youtube performance here in Brazil has been terrible lately. Checking my browser's activity I can see that my ISP has a local Youtube cache and serves videos in 1.7 MB chunks. Talking to some friends ...
1
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4answers
3k views

Remove directory in ftp

This is probably very simple, but I really can't get it to work. I have an old directory with a symlink in it. I need to delete the directory, but it says it is not empty when I try: rm -f dirname ...
1
vote
1answer
1k views

How to fix this mysql permission problem?

I'm trying like mad to get rails dbconsole to work (Rails 3.2.6, if that helps). The problem is that when I run the command, I get: gems/railties-3.2.6/lib/rails/commands/dbconsole.rb:81:in `exec': ...
6
votes
2answers
1k views

SSH LocalCommand on exit

In ~/.ssh/config you can use the LocalCommand directive to execute a local command whenever you connect to a remote machine via SSH. But how do I execute a command when I exit an SSH connection? It ...
0
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1answer
691 views

OSX : rmdir “permission denied” but directory removed

This is a question from a newbie trying to learn UNIX commands. I was trying to test the rmdir command by removing a test directory located in my Downloads directory. I have read and write rights on ...
3
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3answers
1k views

Issues with .bash_profile and terminal commands

I added some data to my .bash_profile to run two aliases ruby version 19 and the proper gems. As soon as I added the data I could not longer run any commands such as the MacPorts command port nor the ...
1
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1answer
275 views

Re-install ssh-keygen on unix/mac

Something is wrong with the way my Mac generates ssh keys. This has been the second time where I've created a key with ssh-keygen -t rsa. When I paste the created id_rsa.pub to use in a connecting ...
1
vote
1answer
799 views

Append timestamp to top command output

All, I'm using top -l 0 -s 1 -pid XXX -stats rsize | awk 'NR%13==0; fflush(stdout)' > output.txt to store the rsize value of a process in a file. Currently the contents of output.txt look ...
3
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1answer
989 views

Vim script check running platform

" Get running OS let os = "" if has("win32") let os="win" else if has("unix") let s:uname = system("uname") if s:uname == "Darwin" let os="mac" else let os="unix" endif ...