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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2
votes
1answer
28 views

Split shell horizontally to show ls -al and pwd

I use zsh as my default shell on OSX. I would like for my shell to always have a horizontal split showing pwd and ls of the current directory I'm in. How do I go about it ?
6
votes
1answer
57 views

Terminal does not accept pasted or typed lines of more than 1024 characters [duplicate]

When I enter text on stdin in an OS X Terminal, a single line is limited to 1024 characters. For example, cat > /dev/null beeps after I type (or paste) a line longer than this, and refuses to ...
3
votes
1answer
3k views

Sound volume control does not work in Ubuntu

My sound volume control does not work when I'm logged in with my regular user, though the sound works correctly. What's weirder is that the sound control works when I'm logged in as guest. With my ...
2
votes
2answers
494 views

Is there a way to get “top” to run exactly once and exit?

I find the output of the shell command top to be a simple and familiar way to get a rough idea of the health of a machine. I'd like to serve top's output (or something very similar to it) from a tiny ...
4
votes
2answers
177 views

Man page quotation characters [duplicate]

I've just been looking through a few man pages for a few different commands including grep and ifconfig. I've noticed over a few pages, the content uses a strange syntax to notate what i think are ...
0
votes
1answer
11 views

Dual-boot Mint on OS X: is OS X Startup Manager not suitable to boot Mint partition?

I am thinking of dual-booting Linux Mint on Mac OS X, and for that reason I was reading a tutorial about it (http://community.linuxmint.com/tutorial/view/1643). After Mint's installation the tutorial ...
3
votes
2answers
175 views

How can I import new Unix commands on my OS X Terminal?

There are a number of Unix commands which do not work on my OS X Yosemite 10.10.3, Terminal Version 2.5.3. For instance, I often use this cheatsheet of Unix commands: ...
1
vote
2answers
782 views

Linux guest VM on mac host - Keyboard

I use a Mac as a development box, but am slowly transitioning to Linux. So I am spending the majority of my time in the Linux guest VM while working. But I still spend a fair amount of time in Mac ...
2
votes
0answers
29 views

Identify process

Every couple of minutes my Mac OSX machine starts running a process that consumes 10% of the CPU. It runs for a couple of seconds and then stops. I can see the process coming up in 'Top', but the name ...
1
vote
0answers
15 views

Lsyncd not working on Mac 10.9

I'm attempting to use lsyncd to automatically move files to my local development server. My host is OSX 10.9. SSH on the server works. I can connect using ssh from the host. I am using an SSH key to ...
2
votes
1answer
18 views

How to configure Alpine to use an alternate editor on Mac OS X?

I'm considering using Alpine on OS X (Yosemite). I have most things configured, but I want to be able to use a GUI text editor (specifically OS X's TextEdit) as the Alpine alternative editor, so that ...
3
votes
1answer
90 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 ...
1
vote
0answers
32 views

does vi have a bug which changes spaces in unedited lines, or is there an option to turn this “feature” off?

I changed a file by just adding a few lines, then ran a git diff and found changes strewn throughout the file resembling as shown in the image above: an extra space at the end of a line in the ...
6
votes
10answers
27k views

Install rEFInd on OS X 10.10 Yosemite

I want to dual boot my macbook with Arch Linux and thus tried to install rEFInd using the install script, however, after install rEFInd doesn't seem to start at all? Anyone experienced the same issue ...
4
votes
0answers
44 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 ...
3
votes
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
votes
1answer
33 views

How do I check if sound card is in use and, if possible, which process is using it?

I want to know if a program is using my sound card without my knowledge. I thought about building a program that uses low-level device driver code to do the trick, but am now interested in seeing if I ...
1
vote
1answer
14 views

Installer thinks there's an installation in progress on OS X

Every time I log off on my user account, an Installer prompt comes up asking "Are you sure you want to abort the installation?" and the options are Abort or Cancel. I am absolutely certain that ...
1
vote
1answer
512 views

MacOS X Mavericks running VirtualBox cannot communicate with Linux VM

I have a MacOS X Mavericks host running Vagrant using VirtualBox as a provider. I have experienced several times that with different VMs (particularly Ubuntu Linux VMs) after the first time the VM is ...
1
vote
1answer
25 views

What happens if I move the hard drives used by Rsync to another computer, and keep syncing them with it?

I realise the question is confusing, so allow me to elaborate. I apologise for the phrasing, as I wasn't sure how to put it. Here's the scenario: As my backup, currently my Mac launches Rsync every ...
3
votes
1answer
101 views

Accidentally deleted /var folder

I accidentally moved my /var folder to trash and now unable to login to Mac. The only solution I found until now is to recover OS X. I have tried to move /var back to /private folder in single user ...
1
vote
1answer
1k views

Confused about how to convert XML to CSV using xmlstarlet on OS X?

I asked a question earlier and it was closed as being a duplicate: How to parse XML to CSV with a shell script?. The answer in the duplicate that was linked suggested using a tool called XMLStarlet, ...
0
votes
1answer
21 views

virtualbox on os x lags when not active

I am running ubuntu server as guest inside virtualbox on os x 10.10.x host While the system works, it lags whenever the virtualbox window is not the active app. E.g. I log into ubuntu from terminal ...
0
votes
0answers
45 views

connecting to virtualbox ubuntu from osx extremly slow

I am running ubuntu 10.04.x as guest on virtualbox from osx x 10.10.x host It works (kind of), but after working a while with it and also after power sleep it can get almost unusable slow. It looks ...
0
votes
3answers
56 views

Removing line-breaks, whitespaces and tabs from every file

Say I have a folder with 10K text files. I would like to remove every space, TAB and linebreak from each file. How can I do this efficiently?
0
votes
1answer
187 views

How can I delete files on a read-only file system?

I have an encrypted .dmg file with some useless files that I need to delete to make space. How can I delete them without having to convert them into a read write system and then back? (Would take 4~5 ...
0
votes
0answers
24 views

Repair/fix HFS+ partition (“Invalid B-tree node size”)

salam I need help with a 800GB partition. I accidentally deleted my partition with diskutility, but it says something like "Error that disk in not good". I already tried Testdisk; it finds my ...
1
vote
1answer
33 views

Using git over sshfs on OSX

Due to a new job, I'm switching from working on Ubuntu 14.04 to OSX Yosemite. I mainly work in R, and I was using RStudio and git to manage my code on a server (Debian). To this I mounted the server ...
0
votes
0answers
31 views

can I boot ext4 usb stick with xubuntu on from a Mac laptop?

is there a way to boot my ext4 formatted "xubuntu" USB memory stick from a Mac laptop? The laptop can identify FAT32 usb memory sticks with ubuntu at boot time, but it cannot identify mine, which is ...
0
votes
0answers
38 views

Using brew: curl version error, “Incompatible library version” for libcurl.4.dylib

I used to have a working version of homebrew but then something broke today related to curl and libcurl.4.dylib— possibly a version or file location issue. I'm on Mac OS X 10.9.5 (Mavericks). For ...
1
vote
1answer
97 views

Is there a canonical method to restrict ssh access to certain IP addresses in Unix?

I checked man pages related to ssh on OS X and other systems and tried using hosts.allow and hosts.deny files as per this post, and sshd_config to no avail. $ cat /etc/hosts.allow sshd: ...
1
vote
1answer
22 views

OSX: MBP: How does system detect sd card inserted?

I have a MacBookPro running Mavericks. I can insert one sd card into the slot and it mounts just fine. Another sd card I slip in and nothing happens. It does not appear in disk utility. It does ...
1
vote
1answer
631 views

VPN Setup Errors

I'm trying to install a VPN on one of our servers for use within my campus so that we can play some games, but I appear to be getting errors when I try to connect, as shown below. Not quite sure about ...
1
vote
0answers
22 views

Installing homebrew - dangerous permission changes?

I'd like to install homebrew, but when I start it up, I get this message: ==> The following directories will have their group set to admin: /usr/local/. /usr/local/include /usr/local/lib Seems ...
14
votes
6answers
3k views

OS X: how to keep the computer from sleeping during a ssh session

When I ssh into a OS X computer on my network the session lasts until the OS X goes into sleep mode. Is there a way to prevent this from happening during my SSH session, apart from physically bumping ...
0
votes
1answer
97 views

Cannot share folders betwen Mac OS X based VMWare 7.1.1 and Guest Fedora 21 system

I would like to share my Mac OSX 'Downloads' folder. I set this up as a shared folder in vmware settings. Currently, although I made a folder at mnt/hgfs/Downloads, it does not have the contents of ...
1
vote
1answer
2k views

Why is my Mac, upgraded from Mavericks to Yosemite, no longer giving VMware Fusion needed resources?

I have a Mac upgraded from Mavericks to Yosemite. When I tried to run VMware Fusion, I got an error stating: Could not open /dev/vmmon: No such file or directory. Please make sure that the kernel ...
1
vote
0answers
34 views

Why can't Adobe Flash for Mac run on Linux?

As we know, Adobe no longer develops new Flash versions for Linux (except for Google Chrome, i know). It does, however, develop actively Flash for Windows and Mac. Linux can run native Windows ...
4
votes
2answers
1k 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 ...
4
votes
1answer
441 views

Can I write C programs for Linux on OS X?

In case I'm writing a program (of any kind) in C, that is meant to be run on Linux environment, can I write it under OS X? (concurrency wise for example) I'm asking this because I like programming in ...
4
votes
0answers
61 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. ...
1
vote
1answer
46 views

Operation not permitted

I'm on OS X and I'm trying to write an interface for for an interpreter, the communication with the interpreter looks like this in PHP: $f = fopen('mmascript.m', 'w'); fwrite($f, ...
2
votes
1answer
85 views

Best way to connect to an existing user context through SSH

What we would like to do: We have short living virtual machines for running scripts. The virtual machines are used through SSH to perform "builds" (sequence of scripts) and discarded once all the ...
14
votes
6answers
19k views

How can I page up or down in tmux with Terminal.app?

I have tmux installed. But I can not scroll up or down. I.e. as soon as I tmux I get only a portion of the screen and can not scroll up. crtl-b + Page Up does not work since I am in Mac and I can not ...
2
votes
1answer
32 views

Cannot edit sudoers file - Cannot execute sudo

I cannot currently use sudo. I also cannot edit the etc/sudoers file because sudo does not recognize me. $ whomai myusername $ sudo visudo Password: myusername is not in the sudoers file. This ...
23
votes
8answers
59k views

How can I display the contents of a text file on the command line?

I would like to display the contents of a text file on the command line. The file only contains 5-6 characters. Is there an easy way to do this?
0
votes
1answer
24 views

find returns weird file order on RHEL but not on OSX [duplicate]

When I enter find . -iname "[0-9]*.nii" on my OSX machine it returns: ./03_Rest_fcMRI/9793_01_03_1.nii ./04_VEMP/9793_01_04_1.nii ./04_VEMP/9793_01_04_2.nii ./05_Tapping/9793_01_05_1.nii ...
1
vote
1answer
20 views

How do I get the Truecrypt CLI installed?

I have a unix machine with truecrypt 7.1a installed. I'm trying to mount a volume to test with the command line but I don't have the truecrypt command installed evidently. Did the command line ...
0
votes
1answer
21 views

printenv.wsf and printenv.vbs in /Library/WebServer/CGI-Executables

Please don't shoot this one down, as I looked through my Macbook Air and wanted to configure my Apache installation to more specific needs, I came across printenv.wsf and printenv.vbs, which I find ...
1
vote
1answer
16 views

How to have tmux on startup for both OSX and Ubuntu (including Quake)

I recently updated my Ubuntu 14 system and the update has made it impossible to have tmux started up automatically. In fact the previous setting made it impossible to log into my Ubuntu account(!), ...