These questions are about Linux in general -- NOT specific to a particular distribution. If the question just happens to be in a Linux environment, please specify your Linux distribution in the body of your question, but do NOT use the /linux tag.

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6
votes
1answer
6k views

Find processes using a network interface

I'm trying to find a way to safely shutdown a network interface, i.e. without disturbing any processes. For this I need to find out what processes are currently using that interface. Tools like ss, ...
23
votes
2answers
10k views

Can I watch the progress of a `sync` operation?

I've copied a large file to a USB disk mounted on a Linux system with async. This returns to a command prompt relatively quickly, but when I type sync, of course, it all has to go to disk, and that ...
2
votes
1answer
201 views

Virtual terminal switched when USB mouse plugged in Linux

Our machine runs a modified RedHat 9 (Kernel Linux 2.6.20-1.21, GNOME 2.10.0). When USB mouse is plugged in, the X Window will always switch out, we have to switch back by Alt + F7. There is no such ...
1
vote
0answers
167 views

BackTrack5 R2 video driver works, but presents disturbing error message

I've installed backtrack 5 R2 on my computer and everything works fine but the video driver. The solution described here does work, but whenever I start the graphics mode, a message saying that the ...
7
votes
1answer
2k views

Ubuntu Linux Router: Set outbound NAT on 2 interfaces

I'm setting up a router using Ubuntu 12.04. I need my router to route between our internet modem and my client's network, for which we're given one IP address. The box has 3 interfaces: eth0 - ...
6
votes
2answers
11k views

File descriptor linked to socket or pipe in proc [duplicate]

Possible Duplicate: /proc/PID/fd/X link number i have a question regarding the file descriptors and their linkage in the proc file system. I've observed that if i list the file descriptors ...
3
votes
1answer
559 views

cpufreqd does not control temperature plus shows no output

Since my laptop (an Acer Aspire 5750G running a Gentoo Linux with a not-quite-up-to-date kernel 2.6.39-r3 (a weird wLan hardware makes the update difficult)) tends to run rather hot I am trying to ...
2
votes
3answers
15k views

Apache 403 Forbidden on sub folders?

I can view all files in the root directory (/var/www) but as soon as i enter a sub directory (eg /var/www/test) i get a 403 Forbidden error. I'm running Ubuntu 12.04.01. Have tried searching for ...
0
votes
2answers
4k views

Upgrading php on a Linux server

I am running a Redhat on a webserver. The current version of php on the server is 5.1.6. I want to upgrade it to 5.3.8 so I downloaded php and compiled it and replaced the older php binary with the ...
6
votes
1answer
181 views

Does the suid bit have any meaning for device files?

Does the suid bit have any special meaning for device files in Linux ?
9
votes
9answers
24k views

How to clean up unnecessary files

Please suggest me any particular unnecessary file that I can clean to back everything to normal condition(temporarily). (i.e. any log or archieve or anything ). My var/log has only 40MB and Home ...
0
votes
3answers
3k views

Differences between Windows registry and UNIX/Linux approach [closed]

What are the main differences between the Windows registry and the approach used in UNIX/Linux, and what are the advantages and disadvantages of each approach?
13
votes
4answers
3k views

Why is Perl installed by default with most Linux distributions?

Just curious. The title says it all: Why is Perl installed by default with most Linux distributions?
1
vote
1answer
1k views

How to force a particular version of Java?

I am on a RHEL 5.5 64 bit box. The systems engineer installed the 64-bit Java VM under /usr/bin ; however, I needed a 32 bit VM which he installed in /opt/jdk1.6.0_35. But now, everytime I do java ...
5
votes
3answers
5k views

On Ubuntu Linux, is it normal for mandb to run continuously (apparently in the background)?

I have access to a Ubuntu Linux node at my institution. The nodes are shared among the group, but typically I am the only person who uses this particular node. I am running a calculation in parallel ...
0
votes
3answers
12k views

How to create command shortcut to .sh file?

I want to type firefox in terminal and run Mozilla browser. So I try to create sym-link: ln -s /opt/firefox firefox but after typing firefox in terminal I get an error: bash: firefox: command ...
0
votes
2answers
263 views

What factors contribute to the expense of migrating to Linux? [closed]

People have various reasons(... and more reasons) to use Linux: Freedom Reliability Stability Security Commercial support But the question of cost is usually put aside, although Linux ...
2
votes
1answer
269 views

Will select() return before next jiffy if waiting on a high resolution timerfd?

If I have A kernel with CONFIG_HIGH_RES_TIMERS=y, A coarse CONFIG_HZ (say, 100) and a file descriptor from timerfd_create with a sub-jiffy expiration Should a call to select() on this timer ...
1
vote
3answers
783 views

Redirecting without color [duplicate]

Possible Duplicate: Removing control chars (including console codes / colours) from script output How do I disable all color codes when redirecting to file? I previously asked how to ...
2
votes
1answer
296 views

Redirecting output to file

I am looking forward to run commands and log their output in a temporary log file to be read later on by different processes. So, for example: rc.d start ntpd > progress.txt Returns: ::Daemon ...
0
votes
2answers
3k views

Related to apt-get update command

I am using Ubuntu12.04 and I installed lots of pkg. I want to update only one specific pkg. I tried using $apt-get update pkgname E: The update command takes no arguments so then I tried ...
1
vote
3answers
810 views

How do I execute a newly installed application with Sudo?

I have just installed an application on my Amazon EC2 instance called sshpass. I am having trouble getting it to work properly ( although, it works correctly on a non AWS instance ). I've read in ...
1
vote
3answers
3k views

Root permission - username ALL=(ALL) ALL does not work

I'm a beginner. I'm trying to give my user root permissions, so I edited the sudoers file like this: black ALL=(ALL) ALL "black" is my username. But I still don't have root permissions, and ...
6
votes
4answers
4k views

How to setup password-less ssh with RSA keys

I am trying to setup a password-less SSH configuration between two machines and I am having a problem. There are a ton of howtos out there that I have followed and have had no success. Here are the ...
1
vote
1answer
83 views

Rebooting makes me lose my password-less keys on other machines

When I reboot my machine (as I did today) I seem to lose some functionality, specifically my previous ssh keys that I had copied over to other machines that had allowed me to login without a password ...
2
votes
0answers
1k views

Linux bridge blocks UDP packet from tap interfaces

Introduction: I'm working on a 6lowPAN projects of Wireless Sensor Networks. Basically, I have a set of nodes (Contiki OS) which are running on a linux host. Each nodes have its own tap interface ...
2
votes
2answers
831 views

Putting Linux processes on certain CPU cores [duplicate]

Possible Duplicate: How can I set the processor affinity of a process on Linux? Computer CPUs have many cores insde them nowadays. I have always wondered if there is a way to, when I start ...
2
votes
1answer
174 views

Can I lock the root account during an install of Debian GNU/Linux 6 “squeeze”?

By default, Ubuntu locks account root; can I do the same, in Debian GNU/Linux 6 "squeeze", during install?
10
votes
1answer
15k views

Group within group file permissions

I tried finding this on here, but couldn't so sorry if it's a duplicate. Say I have 2 groups and a user: group1, group2, user1 with the following structure: group1 is a member of group 2, user1 is a ...
2
votes
1answer
141 views

Expanding a partition in Ubuntu

This is what GParted displays about my partitions. And this is the output from df: Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 61409452 4503052 53786836 8% / udev ...
10
votes
1answer
6k views

Load Linux bzImage in QEMU?

I compiled a Linux by doing make menuconfig then make and now I have compiled the most recent version of Linux. How can I load the kernel into QEMU?
5
votes
1answer
2k views

System freezes. Can't find anything in the logs

My linux desktop system freezes (aptosid/debian sid) sometimes and after a reboot I can't find any infos about the reason for the freeze in messages/dmesg/syslog/Xorg.*.log. When it "freezes" I can ...
6
votes
2answers
15k views

Linux max threads count

my server has been running with Amazon Ec2 linux. I have a mongodb server inside. The mongodb server has been running under heavily load, and, unhappily , I've ran into a problem with it :/ As known, ...
4
votes
2answers
4k views

SSH not landing in the home directory

I have recently installed Raspbian into a Raspberry Pi. As part of the installation process I changed the user name and group from the default (pi) to my own (let's call it user) using usermod and ...
3
votes
1answer
1k views

Regarding generating intersection and union of two csv files

I have two csv files, there are some overlap columns between these two files. Assume one file is called as A.csv and another is called as B.csv. The intersection of A and B is called as C. I would ...
33
votes
2answers
2k views

Oldest binary working on Linux?

In a discussion on backwards-compatibility in Linux kernel and GUI ABIs, Alan Cox notes that "my 3.6rc kernel will still run a Rogue binary built in 1992. X is back compatible to apps far older than ...
2
votes
0answers
207 views

Automatically start named pipe reader on startup?

I'm trying to run a script with root access from PHP. I can't do that because Apache's user, www-data, don't have root access because of security reasons. To fix that, I was advised to use a named ...
3
votes
0answers
411 views

How to know the event by looking at /dev/input/by-id

I want to access the keyboard device driver. I usually accesses it by looking at /dev/input/by-name but the event provided by it gets changed every time I log in. After searchin on the Net, I found ...
2
votes
1answer
978 views

Fail to ssh to remote machine via hostname

The problem is that I fail to SSH to a remote machine via its hostname, while using its IP works. The hostname returned by command hostname is: california_desert while the name returned by command ...
2
votes
0answers
153 views

Linux boots sometimes into kernel instead of Openbox

I have a Solid-Run Cubox and installed Debian Netboot on it. Now I want to configure it as webserver/kiosk PC to run a self made webapp. I installed xorg, openbox, apache/php libs and wrote my own ...
5
votes
2answers
4k views

What is resolv.conf and why VPN client's hack it?

As stated in a previous question I want to connect to 2 VPN servers at the same time and for each connection specify the IPs of computers I want to reach with it. One of this VPN connection is done ...
5
votes
1answer
1k views

Run shell script when new volume mounted

I'm interested in running an rsync script whenever any new volume is mounted on my Debian box. What are some potential triggers / strategies for listening for a new volume mount?
8
votes
3answers
15k views

What exactly are Linux kernel headers? [duplicate]

Possible Duplicate: What does a kernel source tree contain? Is this related to Linux kernel headers? I know that if I want to compile my own Linux kernel I need the Linux kernel headers, ...
6
votes
3answers
3k views

How to set bash to run *.exe with mono?

Without any DE or even X, I want to use ./my.exe to run mono my.exe, like it works with python scripts.
0
votes
2answers
501 views

df reports the space occupied in the partition, but there is no data

Pasting the output of df -h for the /mtd_rwarea partition: $ df -h Filesystem Size Used Available Use% Mounted on /dev/mmcblk0p16 150.0M 138.5M 11.5M 92% ...
10
votes
3answers
12k views

How does the Linux kernel handle shared IRQs?

According to what I've read so far, "when the kernel receives an interrupt, all the registered handlers are invoked." I understand that the registered handlers for each IRQ can be viewed via ...
0
votes
1answer
311 views

What is the best procedure for setting up a triple-boot system?

I have a machine that I wish to install 3 operating systems on. The systems are, in no particular order, Windows 8, Ubuntu, and Backtrack Linux. Is there some document or step-by-step guide to the ...
11
votes
2answers
11k views

How to mount multiple directories on the same partition?

I am installing an SSD and would like to put / on the SSD and /home, /var, and /tmp on the HDD. My current distro is Kubuntu but I would not mind trying another distro if this procedure can be ...
37
votes
5answers
20k views

What is the difference between kernel drivers and kernel modules?

When I do a lspci -k on my Kubuntu with a 3.2.0-29-generic kernel I can see something like this: 01:00.0 VGA compatible controller: NVIDIA Corporation G86 [Quadro NVS 290] (rev a1) Subsystem: ...
3
votes
1answer
1k views

SFTP: give user access to folder outside home

I have a machine running Ubuntu 12.04 LTS with OpenSSH server installed. I have created a user with a jailed home account. When I log in with the user's account, I can only access his home (duh). ...