7
votes
1answer
864 views

what is the distinction between /media, /mnt and /run/mount?

In FHS-2.3, we have /media that holds mount points for removable media such as CD-ROMs and we have /mnt that holds temporarily mounted filesystems. On the other hand, we have /run/media and ...
7
votes
1answer
3k 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 ...
7
votes
1answer
625 views

Init as a shell script

I was going through a tutorial on setting up a custom initramfs where it states: The only thing that is missing is /init, the executable in the root of the initramfs that is executed by the ...
7
votes
4answers
12k views

shortest way to replace characters in a variable

There are many ways to replace characters in a variable. The shortest way I found out is tr so far: OUTPUT=a\'b\"c\`d_123and_a_lot_more OUTPUT=$(echo "$OUTPUT"|tr -d "'\`\"") echo $OUTPUT Is ...
7
votes
4answers
1k views

How does linux handles zombie process

Zombie processes are created in Unix/Linux systems. We can remove them via the kill command. But is there any in-built clean-up mechanism in Linux to handle zombie processes?
7
votes
1answer
892 views

How does VARIABLE=() { function definition } work in bash

I have seen something like this in my bash ENV: module=() { eval `/usr/bin/modulecmd bash $*` } How does this construct work? What is it called? I'm not asking about modulecmd, I am asking about ...
7
votes
1answer
2k views

Create PKGBUILD from .deb

I have a .deb debian package which essentially contains the binaries of the software as a /usr/share/bin folder in a compressed data file, and another metadata compressed file containing the checksums ...
7
votes
2answers
278 views

How to make files inside TMPFS more likely to swap

I'm using tmpfs for my /tmp directory. How can I make the computer decide to swap out the files inside the /tmp before swapping out anything that is being used by applications? Basically the files ...
7
votes
3answers
7k views

disable init.d script in systemd

I changed the init system from sysvinit to systemd on a raspbian installation. The install boots fine, but now starts lightdm on boot. I don't want it to do that. I noticed lightdm.service is started ...
7
votes
2answers
4k views

64-bit kernel, but all 32-bit ELF executable running processes, how is this?

The output from uname: root@debian:~ # uname -a Linux 5asnb 2.6.32-5-amd64 #1 SMP Mon Jun 13 05:49:32 UTC 2011 x86_64 GNU/Linux However the /sbin/init executable shows up as 32-bit: root@debian:~ ...
7
votes
5answers
568 views

List out strings which are substrings of other strings in the list

I have a list of names like so: dog_bone dog_collar dragon cool_dragon lion lion_trainer dog I need to extract out names that appear in other names like so: dragon lion dog I looked through the ...
7
votes
2answers
17k views

nginx + php5-fpm doesn't work properly. I see a white screen only

I've just installed nginx and php5-fpm and I wanna test it on port 82. So I call http://mysite.com:82/test555.php and I see nothing. Just a white screen. No errors, no warnings, I don't see nothing at ...
7
votes
1answer
173 views

Is there any guarantee that /usr/bin/env will exist?

Often I will see scripts begin with a shebang line that uses #!/usr/bin/env interpreter_name for whatever interpreter, with the rationale that different systems might have the interpreter that they ...
7
votes
2answers
1k views

How can I allow a user to prioritize a process to negative niceness?

I want a user to run a specific process on the system with a negative nice value. I can't simply fork the process to background as this specific program is a minecraft server and I rely on the command ...
7
votes
1answer
958 views

SELinux re-labeling problem while attempting to run OpenVPN

I'm trying to run OpenVPN under Fedora 19 with selinux (selinux-policy-targeted) in enforcing mode, and I'm running into an AVC I'm not entirely sure how to handle. Starting OpenVPN from the command ...
7
votes
2answers
1k views

In Bash scripting, what's the meaning of “ $! ”?

If I'm assigning a variable with temp=$! what would it be its value?
7
votes
1answer
3k views

Keyboard shortcut to copy current command from terminal to clipboard [duplicate]

Is there any way to copy current command (line typed in bash prompt) in terminal to X-clipboard without involving a mouse?
7
votes
3answers
2k views

Linux/GParted can see partition table but dd bs=512 count=1 can't

I have an MBR formatted sd card and when connect to a Linux machine (xubuntu 12.04) it can mount a partition and parse the file system (as can GParted). However, when I try to read the MBR from the ...
7
votes
2answers
6k views

Launch a GUI browser on server without a GUI? [duplicate]

What's a simple way to launch a browser on an server that doesn't have a GUI, but needs a GUI-like browser? Something like Firefox or Chrome. I need to trigger a page load but it needs full javascript ...
7
votes
3answers
4k views

Adjust mouse wheel sensitivity in Fedora / Gnome

Short Question Is there a way to adjust the mouse wheel scroll sensitivity in Fedora 18? Long Question I'm running Fedora 18, with the standard Gnome desktop. I use a Logitech M705 mouse with the ...
7
votes
3answers
1k views

Unix sort out of memory

I'm sorting a 25 GB file containing 200M lines on Fedora 18 using: sort -S 10G -T /bigdisk bigfile and I am getting process killed due to no memory. The process isn't maxing out my RAM before death ...
7
votes
1answer
1k views

Using systemd to execute a script before system shutdown?

I wrote a script that suspends all my VirtualBox machines, and put a line in /etc/rc.local.shutdown, but it doesn't seem to work, su - XX -c /XX When I'm booting the next time, VirtualBox tells me ...
7
votes
1answer
2k views

Problems running python script from motion

I'm trying to set up the raspberry pi with my webcam as a motion detecting cctv that uploads the videos to google drive using Jeremy Blythe's script I have motion working correctly and the python ...
7
votes
2answers
5k views

cp -f cannot overwrite cp -i alias

In my /home/user/.bashrc file, I have those aliases to prevent mistakes: alias rm='rm -i' alias cp='cp -i' alias mv='mv -i' If I'm really sure of what I'm doing, I can overwrite rm and mv aliases ...
7
votes
4answers
1k views

Linking /proc/mnt to /proc/mounts

I understand that /proc filesystem reflects the output of various processes. Unfortunately, I have a propietary (romdump) binary that expects the mount table to appear as /proc/mtd, while my Android ...
7
votes
5answers
5k views

Replace dots with underscores in filenames, leaving extension intact

I have a bash script which I'm trying to get to replace dots in filenames and replace them with underscores, leaving the extension intact (I'm on Centos 6 btw). As you can see from the output below, ...
7
votes
1answer
2k views

VIM Executing a key command in a function

I have a function, and I want to execute a key command, but I get the error Trailing characters: function! MyFunction() if condition <C-W><C-W> else :some_other_command ...
7
votes
4answers
7k views

printing problems with DDST (aka PCL6) printer RICOH Aficio SP C240DN

I'm having big problems printing on a RICOH Aficio SP C240DN (a color laser printer). CUPS/OpenPrinting doesn't have a driver for exactly this printer. There are similar numbers but not 240DN. It ...
7
votes
2answers
2k views

An oom killer thats baffling me

I am not able to understand why would kernel issue this oom killer when I see enough memory is available: Also why are there so many kernel cache pages allocated? I say enough memory is available ...
7
votes
1answer
3k views

Korn Shell: End, pgup, pgdown, and delete key not working

So basically my End, Pageup/Pagedown, and Delete key are not working in ksh93. I'm running FreeBSD by the way. My arrow keys are working, and so is my home key. Those keys work when I put this in my ...
7
votes
2answers
6k views

Can't find or create trash while deleting files

I was unable to remove a file anymore with thunar: How should I create the "Trash" folder ?
7
votes
2answers
5k views

How to find out which file is currently written by a process

My situation is that from time to time a specific process (in this case, it's Thunderbird) doesn't react to user input for a minute or so. I found out using iotop that during this time, it writes ...
7
votes
6answers
11k views

Configure reboot on Linux kernel panic

You can put "panic=N" on the kernel command line to make the system reboot N seconds after a panic. Is there a config option to specify this (other than the default kernel command line option)?
7
votes
2answers
4k views

My .xsession and .xinitrc files are not executing

I have installed xmobar, xmonad on ubuntu 11.04. #!/bin/bash trayer --edge top --align right --SetDockType true --SetPartialStrut true \ --expand true --width 10 --transparent true --tint ...
7
votes
2answers
481 views

iPhone type login screen?

The person that introduced me to Fedora had somehow made his login screen so that instead of typing in a password he used the "connect the dots" password that's popular on phones. Eg On my ...
7
votes
3answers
2k views

Why do we need to specify partition type in fdisk and later again in mkfs?

I'm a little confused about fdisk and mkfs. So - here is typical USB flash drive partitioning and formatting: umount /dev/sdb fdisk fdisk /dev/sdb Command (m for help): d Selected partition 1 ...
7
votes
1answer
327 views

Change date “July 29th, 2011” to “20110729”

I have lots of HTML files contains date with format July 29th, 2011 I want to change date format July 29th, 2011 to 20110729, December 9th, 2010 to 20101209, etc. I think sed may works but still ...
7
votes
2answers
570 views

How do I get just the user-manual for Vim

To get the vim user-manual I am doing vi test and then, once the file is opened, I do :help user-manual This opens up a split window, which makes reading manual inconvenient to read. How do I ...
7
votes
5answers
284 views

Changing Unix group for files

I have a file that a colleague and I are editing together, on a Unix system. We are using Unix group permissions to edit it. We have one Unix group that we are both members of. Whenever I save the ...
7
votes
3answers
1k views

In bash, what is the safest way to pass variables to another program — $* or $@? [duplicate]

Can someone explain to me in a concise way what the difference between these two vars is? What is the safest way to pass variables to another program? E.g. #! /bin/bash # do stuff # pass ...
7
votes
2answers
2k views

How can I cut a large file in place? [duplicate]

I have a very big text file, about 80GB, and I need to cut a part form it that lies between two given lines. The part I need is not big, and I have not enough space left on the hard drive to do things ...
7
votes
2answers
917 views

What governs the limits of shell brace expansion?

In this example I refer to the expansion of a sequence of integers, but perhaps(?) the limits would be relevant to all aspects of brace expansion.. This more general view is also of interest to me. ...
7
votes
1answer
1k views

Why root's default shell is configured differently with other normal user account's default shell?

As I know, root's default shell is configured csh and normal user's default shell is sh in FreeBSD. And in Ubuntu, root is dash, normal user is bash. (refer: What's the Ubuntu's default shell?) Why ...
7
votes
2answers
152 views

How does one find and replace text in all open files with jed?

How does one find and replace text in all open files with jed?
7
votes
3answers
7k views

Disable Composite without restarting X

In order for me to watch HD videos without tearing, I need to disable my Composite setting in xorg.conf Section "Extensions" Option "Composite" "Disable" EndSection But I love my transparency, ...
7
votes
1answer
828 views

What steps does the system go through when handling an SSH connection?

What steps does the system go through when handling an SSH connection? We try to log in via ssh sshd starts pam and pam module to authenticate us Depending on pam configuration, we need to provide ...
7
votes
2answers
2k views

How to merge patches

Sometimes I need to merge two patches. I can apply them but often it is not convenient (coping, temporary files etc.). Is there a tool to merge patches (assuming they are not conflicting)?
6
votes
2answers
134 views

Postfix + SpamAssassin: Incoming mail headers changes

I made a Postfix + SpamAssassin setup following the instructions most website recommend for this kind os setup. Basically I edited my master.cf to add: smtp inet n - - - ...
6
votes
2answers
461 views

Gparted says disk is full but it isn't

I'm on Manjaro and today I woke up to find my computer having problems due to a full disk. I have deleted many things but this did not solve the issue. I have no idea what is happening. Is there a ...
6
votes
2answers
110 views

Recovering ext4 superblock

I had an ext4 filesystem in an LV which got destroyed because I accidentally shrunk the partition it was in way too small. After expanding the partition back to the original size I put a new ext4 FS ...

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