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.

learn more… | top users | synonyms (1)

1
vote
0answers
112 views

Unable to create a configuration directory for [FishShell] Please set the $XDG_CONFIG_HOME variable

I'm getting this error when starting fishshell: melanie:~ melanie$ fish fish: Unable to create a configuration directory for fish. Your personal settings will not be saved. Please set the ...
4
votes
6answers
1k views

grep invading my ps [duplicate]

When I'm checking for some process, I usually write ps aux | grep myprocess And sometimes I get the output of eimantas 11998 0.0 0.0 8816 740 pts/0 S+ 07:45 0:00 grep myprocess if ...
1
vote
1answer
137 views

Recover partitions Mac OS internal hd

I booted to a live ubuntu USB, wanting to delete partitions on an SD card, and ended up deleting all my partitions on my mac book pro's internal hd. I have already tried gpart (which gets stuck at ...
3
votes
1answer
81 views

Mount USB on Read-Only filesystem

I've got a damaged Mac filesystem, and in single-user mode the command mount -uw / fails (error is something like SATA warning: Enable auto-activate failed). However, I don't need the whole filesystem ...
6
votes
1answer
2k views

How to persist ulimit settings in OSX Yosemite?

Previous question about doing this on Mavericks is here and the answers there don't seem to work on Yosemite. I want to enable core dump generation by default upon reboot. Executing ulimit -c ...
18
votes
4answers
25k views

How to persist ulimit settings in OSX Mavericks?

Before Mavericks, one could use /etc/launchd.conf to persist ulimit settings, for example: limit maxfiles 16384 unlimited limit maxproc 16384 unlimited It no longer works in Mavericks. What is the ...
2
votes
0answers
48 views

What are the benefits of using Tmux at all times? [closed]

I have been using the terminal for all of my local work, and have only been using tmux when I am ssh'd onto another machine and want to make sure I don't lose work if the connection closes. A software ...
9
votes
5answers
4k views

pv for directory copy

I need to copy a very large directory (talking in terabytes here) and want to monitor the progress. I found that pv is a nice utility, but how can I use it for copying directories recursively? (pv ...
0
votes
0answers
21 views

Accessing xfig from x11 fails

I am trying to get access to xfig from x11 on my mac to draw some diagrams and including them in latex, but it shows the following error bash-3.2$ xfig dyld: Library not loaded: ...
2
votes
2answers
378 views

Compare directory trees regarding file name (and size and date)

I want to check the results of a restore from backup. This is, because TimeMachine on MacOS gives me some weird errors and warnings and I want to make sure, everything is in its place again after ...
21
votes
4answers
18k views

Open a RPM on a Mac?

I am on a MacBook Pro running Apple Leopard (Mac OS X 10.5.8). I would like to unpackage a RPM and view the files contained within the wget-1.11.4-2.el5_4.1.src.rpm . I don't need to install the ...
1
vote
1answer
49 views

Accounting for “missing memory” from sysctl

I'm on OS X Yosemite, ran this code: unsigned long num_; sysctl((int[]){CTL_HW, HW_PHYSMEM}, 2, &num_, &len, NULL, 0); printf("AMT MEM: , %lu\n", num_); and getting back 140735340871680 ...
-1
votes
2answers
37 views

OSX bash. grep for string “--version=”

How can I search for string --version= using grep in OSX bash? When I try something like this: grep -rI --exclude-dir=out "--version=" . I get grep: option `--version' doesn't allow an argument ...
2
votes
2answers
222 views

Output of stat on OSX

I want to use the stat command to get information on a file. I did this: Josephs-MacBook-Pro:Desktop Joseph$ echo 'hello' > info.txt Josephs-MacBook-Pro:Desktop Joseph$ stat info.txt 16777220 ...
1
vote
1answer
80 views

Is there a /dev/pts alternative on Mac OSX?

I'm attempting to determine how many terminal windows are open, as described in this Q&A answer. However there doesn't seem to be a /dev/pts on Mac OSX. Is there an alternative to this?
2
votes
0answers
57 views

X forwarding from a mac to Linux fails

I have been having problems recently while trying to ssh into linux servers (Ubuntu 14.04) from my mac (OSX Yosemite 10.10). This used to work fine until my latest update, where I systematically get a ...
2
votes
0answers
127 views

Tmux hangs on first start

I am running Tmux on a OSX (brewed tmux), and everytime I boot my computer, the first time I start tmux, it hangs. Doing a CTRL + T to check it's SIGINFO, gives me "waiting..". To fix this, I need to ...
4
votes
1answer
1k views

Untar a specifc folder within tar.gz

How do I untar/uncompress a specific folder within a tar.gz using the terminal/commandline (Ubuntu 14.04 (Trusty Tahr))? Precise: -file.tar.gz -- folder1 -- folder2 How to extract... ... ...
4
votes
1answer
5k views

find & sed (search and replace)

I'm using the following command on my mac: $find . -name “*.java” -exec sed -i ’s/foo/bar/g’ {} \; and it seems to have no effect. I have two files in the directory that end in .java, which both ...
2
votes
0answers
58 views

“login -qf” as root results in “Login incorrect” error

I'm trying to install pow on an OS X machine.* Some of pow's components have to run as root, so part of the setup process involves running an installation script with sudo. The problem is, this setup ...
8
votes
4answers
7k views

Mac OS X: dircolors not found?

I just switched to a Macbook Air. I installed zsh using homebrew, but when I use some of the code that I (originally had) in my .zshrc, I get an error saying that .dircolors was not found. Below is ...
2
votes
1answer
59 views

Can't use `od` command with directories

I'm trying to use the od command in a directory in OSX but it doesn't proceed and it results in the error message: od: .: Is a directory Could you please help me with it or any equivalent command? ...
1
vote
1answer
490 views

Create bootable hfs+ partition for macbook

I've installed Debian testing on a Macbook Pro (mid 2014) without keeping OS X on the internal SSD. I've used the following GPT partition layout: HFS+ EFI on /boot/efi BTRFS on / SWAP on swap I've ...
2
votes
1answer
72 views

How to make PATH variable exports on MacOSX persistent?

I do export http_proxy=http://proxy:8080 export ALL_PROXY=$http_proxy on my Mac. Brew for instance relies on these settings. How can I make these settings stick between power cycles? Is this the ...
1
vote
6answers
157 views

How to convert dashed string to spaces and caps?

Given the string foo-bar, what is a good way to convert it to Foo Bar? Using Bash, OSX.
0
votes
1answer
73 views

Installing PHP on OS X. Syntax errors?

When installing OS X on Yosemite with curl -s http://php-osx.liip.ch/install.sh | bash -s 5.6, I get the following: **** [WARNING] Detected OS X Yosemite 10.10. As this is quite new, there may be ...
0
votes
1answer
345 views

How can I continue past this point in installing Solaris 11 under VMware Fusion 5.0.4 on Mavericks?

I have a Mac running VMware Fusion 5.0.4 on OSX Mavericks, and I do not seem to be able to get past a certain point on installation on either of two installers I tried. A (text) window comes up, ...
0
votes
0answers
153 views

Why do I get a “preauth required” error when I set “require-preauth = false” in krb5.conf?

On an OS X machine, I'm trying to get a kerb ticket on my organization's kerberos realm. I grabbed a copy of krb5.conf from a Linux machine to make sure my kerberos configuration was correct. I tried ...
2
votes
2answers
952 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 ...
0
votes
0answers
40 views

Why are some processes “killable” by pkill but not killall?

I had over 20 instances of httpd (apache) processes running, so I decided to shutdown these. Normally I use killall, But when I typed killall httpd it just said: No matching processes belonging to ...
0
votes
1answer
50 views

Is hardware helping reducing crashes of OS X? [closed]

I am taking an OS course this semester, and we mentioned that device drivers can cause about 85% of crashes(for Windows). My understanding is that: since many personal computers are configured with a ...
1
vote
2answers
78 views

SSH Tunneling Through a Firewall to a Cluster

I work at a university but I often work remotely. There is a cluster computer at the university that I need to be able to interact with, but its behind a firewall. Let's call the firewall F and the ...
1
vote
1answer
114 views

Symlink all files in a directory with the entire directory tree

Right now I use this ln -s /dir/* /dir2/ Which will symlink everything, but I have to go inside the dir and make a new directory because the folders are also symlinked (this is expected). So here ...
2
votes
2answers
286 views

How to execute Mach-O 32-bit C++ program on Linux?

I want to execute a program (which I know was written in C++), but I get this error: zsh: exec format error: ./myProgram Output of file myProgram: myProgram: Mach-O i386 executable My system is ...
0
votes
0answers
224 views

How to troubleshoot: “X11 connection uses different authentication protocol.”

I start an ssh session with localbox % ssh -vvv -Y remotebox 2>debug_ssh_log ...which succeeds. Then I try to run xlogo on remotebox, but the command fails immediately, and the following lines ...
0
votes
1answer
57 views

.bash_history keeps truncating

My .bash_history keeps truncating even though I set: export HISTSIZE= export HISTFILESIZE= On my .bash_profile. Im not sure when it happens but it might happen when I logout or shut down my ...
0
votes
1answer
55 views

Software installation trouble with Homebrew

I have previously custom installed Python and Homebrew on my OS X 10.9.5 system. I am now trying to install CMake and I am running into various errors such as: cd: /usr/local/src: No such file or ...
0
votes
1answer
912 views

Private VPN compression for faster internet

Background: I'm a student, and currently the WiFi connection at my school is very slow (dead slow). I have an 8Gb 4G data-plan, but even with that, I'm running short at the end of the month. I have ...
2
votes
1answer
147 views

find and sed (find and replace) causes illegal byte sequence on Mac OS X

I am attempting to perform a find and replace of underscores to dots in a directory for certain filetypes only (.mkv, .mp4, .avi). This is the code that I am using (I'm on Mac OS X 10.9): find . \( ...
3
votes
2answers
7k views

Booting Ubuntu from usb on a Mac

I have a Macbook pro (late 2009) running OSX 10.6.8. I want to partition a flash drive and install my Ubuntu iso image onto it. Then I want to boot up from it by (restarting my computer and) holding ...
1
vote
1answer
50 views

Updating a bunch of Macs via SSH. Could use some help

all. I'm working on a script that'll be running from our Mac server, and it will (hopefully) update all of our Macs via Munki (repo is on the same server) and the built-in softwareupdate command. ...
1
vote
1answer
129 views

log rotation fails for dnsmasq on osx using newsyslog

I am running dnsmasq on OSX. I am also using newsyslog to rotate log files. Here is the /etc/newsyslog.d/dnsmasq.conf # logfilename [owner:group] mode count size when flags ...
15
votes
3answers
736 views

Why don't shell builtins have proper man pages?

All shell builtins share the same manual page: BUILTIN(1) BSD General Commands Manual BUILTIN(1) NAME builtin, ! etc. Then there is a little text describing ...
31
votes
5answers
18k views

Is Mac OS X UNIX?

I have this argument recently saying Mac OS X was not UNIX, but Unix-like. I know there is a Single Unix Specification and those spec complaint could use the UNIX trade mark. Is Mac OS X an UNIX ...
3
votes
2answers
2k views

Negative arguments to head / tail

Variants of this question have certainly been asked several times in different places, but I am trying to remove the last M lines from a file without luck. The second most voted answer in this ...
1
vote
1answer
40 views

Unable to view Applications Directory Content in Terminal

Not sure what I'm missing here, but when I try to list the contents of the Applications directory from the Terminal it produces a directory with a couple .dmg files and none of the actual application ...
3
votes
1answer
3k views

Reading FreeBSD UFS formatted external drive in Mac OS X

I have an external USB drive with backup files formatted in FreeBSD's UFS file system. When I plug it into a computer running Mac OS X 10.9.4, I cannot read the drive's contents, and I don't have ...
2
votes
1answer
70 views

OSX/Darwin ACL Format

In OS X, if you want to view the ACL information on a file, you can do so with the -e option of `ls. $ ls -lde app/cache drwxrwxr-x+ 7 alanstorm staff 238 Apr 1 10:02 app/cache 0: user:alanstorm ...
2
votes
1answer
407 views

OS X SSH keeps asking for password [closed]

I connect from a Linux machine to several Macs over ssh using public/private keys. The setup is the identical on every ac, different OSs from 10.5 to 10.9 and publickey working. Only one of them, ...
4
votes
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 ...