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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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 ...
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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 ...
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1answer
415 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 ...
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1answer
35 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, ...
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0answers
45 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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1answer
22 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 ...
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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 ...
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1answer
9 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(!), ...
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1answer
12 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 ...
2
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1answer
34 views

Installing Linux with USB on Mac

I am trying to get Ubuntu (version 14 I believe. It's the latest version) installed on my Macbook Pro (Late 2013 edition 13 inch, no disk drive in it) via a USB Flashdrive. I have followed every ...
2
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1answer
75 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 ...
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1answer
18 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 ...
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1answer
98 views

Edited sudoers file with text editor - now can't run sudo

I now know that I should never try to edit the etc/sudoers file with a regular text editor. However, minutes before I learned this, I saved a new user name in the file with Sublime Text. Now when I ...
3
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2answers
101 views

sed: inserting text before end of <HEAD> section

I need to insert some text into an HTML file before the end of the HEAD section. I'm trying: sed -i "s#</head>#<style> @page { prince-shrink-to-fit: auto } ...
2
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3answers
207 views

Why root does not source .bash_profile?

Everytime I try to login as root using su (not su -), it doesn't source .bash_profile in user1's home directory. Basically my /var/root directory doesn't have .bash_profile, so I put a copy of ...
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2answers
73 views

Mac Terminal - rename *.png.png to *.png

I have a bunch of images that I'd like to rename as follows: *.png.png --> *.png *.jpeg.jpg --> *.jpg *.JPEG --> *.jpg The only thing I've tried thus far is mv *.png.png *.png, but I knew ...
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0answers
36 views

Swap OS X Command/Control keys without changing bash shortcuts

I originally asked this on Ask Different, but I think since my issue is probably more with bash this would be a more appropriate site. First of all, I know that you can use the System Preferences to ...
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0answers
32 views

csvkit Permission denied

I am on Mac and installed csvkit. When I run csvlook, I get a traceback with the following error message: IOError: [Errno 13] Permission denied: '/Library ...
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3answers
136 views

Shell expansion for arguments?

For example: mkdir ~/{1,2,3} Creates directories ~/1, ~/2, and ~/3. It equates to: mkdir ~/1 mkdir ~/2 mrdir ~/3 But, using the same syntax in the case of CMD < argument > : brew {install, ...
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0answers
44 views

Process Being Killed due to low swap

I'm running a python (2.7) script on mac osx yosemite. The script is fairly computationally intensive, certainly bumping up against my machine's RAM limitations. The computer crashes and restarts ...
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0answers
39 views

Catch/diagnose user process being killed - Inexplicably logged out automatically

Context: I'm using bash in Mac OSX Yosemite. Problem: I'm executing a (python) script that I expect to use alot of resources and take a few hours to run, redirecting stdout and stderr to a log file. ...
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0answers
28 views

Content of root's home directory in OSX

What is stored in root's home directory on OSX? What happens if you delete it on accident? Heres whats in my current root home folder. OSX:~ root# ls -lash total 8 0 drwxr-x--- 5 root wheel ...
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41 views

Running Mac OS X under KVM/QEMU

Note to be removed in the future, so as to avoid confusion from answerers and mods edit: Forgot to add in the note, if anyone thinks this is the wrong stack-site to post this, please comment on why, ...
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1answer
34 views

Sed a plist file gives a iilegal byte sequence

With a Unix Mac 10.9.5, French CA version I've read a lot of tips but if the error is gone, the plist is corrupted. the locale command gives: LANG="fr_CA" LC_COLLATE="fr_CA" LC_CTYPE="fr_CA.UTF-8" ...
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0answers
59 views

Where does BPF packet capture read its data from?

I am interested in the low-level interfacing with network packets. From what I read, tools like tcpdump and libpcap use the BPF packet filter device /dev/bpf* to read link-layer network packets (on ...
2
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1answer
46 views

macos - local port redirection using pfctl and syntax errors

I am running MacOS(really BSD), and I want to redirect certain traffic over an ssh tunnel using a a local forward. Seems easy enough, but I am repeatedly blocked by the ambiguous "/etc/pf.conf:29: ...
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1answer
31 views

Transfer executable file from Linux to mac

I have a file that is sitting on my server, this file is an executable file on the server. When I just use SCP to copy it down to my desktop which is a mac i get bash - ./fig up cannot execute binary ...
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0answers
23 views

To plot 7x10 pictures for review in video

Assume you have 77777 pictures. You want to review them and their differences: have 7x10 pictures without margins to have an image viewer where the minimum browse time can be less than 1.0 s such ...
1
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1answer
38 views

mv to file with

I ran the following mv command, apparently by mistake using backslashes by mistake instead of slashes. mv 2015-02-02_flyer_ppces.pdf ..\PPCES2015\2015-02-02_flyer_ppces.pdf The output is empty. ...
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3answers
59 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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2answers
39 views

How can I quickly find the 20 most recently modified files on Mac OS X (instead of using Python)?

Of course it's possible to take the output of find . -type f | xargs ls -l and pipe it to a Python script that would sort the lines and output the top 20. But is there anything faster than that?
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2answers
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SED on Mac OS X

I'm using a MacBook Pro and I want to find and replace a given word with another with sed command, but it makes no changes. What is the problem? sed 's/\<cat\>/dog/g' tt.txt
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34 views

OS X: Apply inheritable ACL permissions to pre-existing subfolders and files

I have a folder with numerous ACL permissions set. Most of these include file_inherit and directory_inherit permissions and therefore should be, and are, automatically propagated to any new ...
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0answers
25 views

Non-deterministic errors when using nested sshfs

The OSX implementation of sshfs doesn't like to connect to my Android phone running SSHDroid, so I'm attempting to gain access by mounting an ubuntu VM via sshfs which in turn has a mountpoint to the ...
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53 views

Sharing folders between VMWare 7.1.1 and Mac OS X using open-vm-tools

I didn't have any luck sharing my OS X 'Downloads' folder with a Fedora guest Linux OS using the VMWare tools (see my earlier question) . I came across this solution (with 8 up-votes) for Ubuntu that ...
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65 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 ...
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1answer
24 views

Multi line substitution duplicating across lines in OSX

I'm a little rusty in my sed and haven't used it much since moving to a Mac but I am aware there seems to be a difference with what sed is used on a Mac per Ubuntu after a few searches. What I am ...
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0answers
18 views

OS X USB installer utilities, cannot ssh any host

I booted my mac from a OS X USB key installer. I cannot boot it from the internal HD because OS is damaged. I want to copy some files from my Mac to another computer with scp. The problem is that ...
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1answer
107 views

Increasing `ulimit -u` settings temporarily in OSX Yosemite

I'm trying to temporarily (without restarting the machine, just for test that starts a JVM) increase the number of processes to 2048 in OSX Yosemite but I'm unable to do so. First, I tried calling ...
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0answers
104 views

How to convert the qemu parameters for an osx guest for libvirtd

I managed to have an osx guest running in qemu with the following commands: // create the virtual image $ qemu-img create -f qcow2 mac_hdd.img 35G // .. install osx ... // start the guest $ ...
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0answers
43 views

How to create multi-bootable OS from USB drive in Mac OS X

While Googling and tried with some instruction from many website introduction including Youtube and also been get through this article http://apple.stackexchange.com/q/130221/116741 but still can't do ...
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1answer
50 views

Error with sed on MAC OS X invalid command u

Im french sorry in advance for my bad english... So i have an error on MAC OS X when im using sed sed -i '' '/user_pref("mail.identity.id1.reply_on_top", 1);/ a\ ...
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0answers
50 views

How do I start dnsmasq?

I have installed dnsmasq but I can't start it: $ dnsmasq dnsmasq: failed to create listening socket for 10.0.1.57: Permission denied $ sudo dnsmasq dnsmasq: failed to create listening socket for ...
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1answer
56 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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1answer
43 views

Mounting smb shares on OS X accessible with Microsoft account

I have a Windows machine which shares a particular directory and only an owner of this directory is able to access it over the network. Owner account is linked to Microsoft account. I am trying to ...
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2answers
56 views

How do I find folders containing no recently modified files?

I have a directory that gets a lot of data dumped into it, and I want to find all directories whose contents haven't been modified recently (e.g., in the last 5 days). I'm trying to compose a call to ...
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100 views

Dual Booting Macbook pro mid-2009 with Ubuntu and OS X Yosemite

Machine - Macbook Pro 15" Mid-2009 Hi, I am trying to triple boot my system with: 1. OS X Yosemite. 2. Ubuntu 14.04 LTS 3. Windows 8.1 For now I am trying to install linux first and then I plan to ...
2
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1answer
38 views

What's the easiest way to detect what signals are being sent to a process?

I'm trying to debug an issue with my shell (specifically, fish) sending signals to my background processes. I'd like to be able to recognize what signals a process is receiving. Ideally, I'd like ...
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1answer
155 views

Why convert .GIF to .MP4 file using by ffmpeg on Mac OSX got .MPEG4?

ffmpeg -i original.gif -r 10 outfile.mp4 According to command above, I've got outfile.mp4 but when clicked to see the information of file, i see it's actually a .MPEG4 file and the icon of file is ...
2
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1answer
45 views

Replacing by tab character in Sed in Osx

I am working in Mac OS X,I have tried several commands in sed to replace by a tab character followed by a file name. for f in *.txt; do sed -i '' -e "s/$/\t$f/g" $f; done for f in *.txt; do sed -i ...