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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7
votes
3answers
2k views

Git based package manager/installer for Linux

Is there any linux distro that has a git based package manager/installer. I want something similar to FreeBSD Ports (which is CVS based, I think) or Mac OS X Homebrew (git based).
12
votes
3answers
42k views

iptables: allow certain ips and block all other connection

How do I allow certain ips and block all other connection in iptables?
0
votes
0answers
13 views

How to automatically generate the device file in linux [closed]

i have written an PCI Driver and inside probe function of it i have block register using register_blkdev(major, "expt"); But i cannot see any device file it has created in /dev directory. The vendor ...
1
vote
0answers
19 views

How to rename boot options with dual boot

I have Ubuntu and Windows 10 installed side-by-side, and the BIOS tool that's installed on the computer is called "Aptio Setup Utility". How can I rename the boot options, not just for the OS I'm ...
1
vote
1answer
186 views

What are the “cpu” and “memory” options on the mount command?

I found some mount commands in a shell script: mount -t cgroup -o memory none /path/XXX mount -t cgroup -o cpu none /path/XXX The question is what does the cpu/memory option mean? I search the ...
0
votes
1answer
1k views

PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/php_mysql.so'

I am running PHP 5.6 on Linux. When I try to load a PHP page, I'm getting the following PHP error. PHP Startup: Unable to load dynamic library /usr/lib64/php/modules/php_mysql.so' When I look ...
1
vote
0answers
26 views

How to have systemd-resolved correctly come alive after hot plug?

Setup I am playing with a small embedded board running Debian Jessie. I am using as much systemd stuff as I can, including the networking stuff. I have added the file: ...
2
votes
1answer
782 views

How to audit access to any file or folder within a given path for specific user

I've been reading some information about configuration of auditd and I just can't figure this out, what I know how to do Log specific system calls by a user Log access to a specific file by all ...
1
vote
1answer
19 views

Nostalgia: Linux 2.0.x and PCI sound

Nostalgic as I am, I've put together some old hardware and installed a S.u.S.E Linux 4.3 from 1996 with kernel 2.0.18 from the original CDs. It runs great including network and decent graphics. Just ...
0
votes
1answer
12 views

Cache not filling error when using mplayer to read from stdin

I have a program that's generating audio and I can't get mplayer to play it. I'm doing ./myprogram | mplayer - -cache 1024 -cache-min 30 -noconsolecontrols And I get the message Cache fill: X% (Y ...
2
votes
0answers
49 views

Sort mount points by mount time

With no command line arguments mount displays all mounted file systems, e.g.: /dev/sdy8 on /bar type ext4 (rw,relatime,lazytime,data=ordered) /dev/sdx6 on /baz type ext4 ...
1
vote
1answer
20 views

mkswap complains that partition is misalilgned (LVM on RAID-0)

I have a RAID-0 setup on two identical hard disks (same brand and model). The partition table is identical on both (I have cloned it). However, /dev/md0 occupies only part of the disks, because I had ...
0
votes
0answers
31 views

Make debian use dual network ports for a gaming server

I have a server that has 2 LAN ports (or internet ports or whatever you call them) and i was wondering if its possible to make Debian Linux to use both ports? I will need maybe a link or somthing. I ...
1
vote
1answer
762 views

Is there any way to get Intel i915 graphics without ACPI?

I've got an old tablet PC that panics on boot with ACPI GPE storms. It boots just fine with acpi=off in the kernel arguments, however I've never been able to get the Intel i915 accelerated graphics ...
2
votes
1answer
9k views

minicom showing offline

I am trying to use minicom in Ubuntu. To do this I first connect my USB to DB9 converter, then I type this command on terminal dmesg | grep tty to check if my USB to DB9 converter is connected ...
-1
votes
3answers
26 views

Get compilate date [duplicate]

I am trying to extract the compilation date from a linux command (or cpp would be fine too). I am using: stat -c %z ./myProgram.bin However, if I copy myProgram.bin to an another place via ssh for ...
0
votes
1answer
33 views

Full system backup with dd include symlinks

I'm really new in unix and Linux and just tried to learn something. My question is how can I make full system image/backup with dd include symlinks? Is dd good or I should use another approach? Can ...
0
votes
0answers
33 views

FreeBSD or simply Docker for my old Linux server?

I have an old obsolete server running a Linux Red Hat server 5.9 and inside a special software for a power plant control and I've been asked to replace this server as not so much spare parts are in ...
0
votes
1answer
22 views

rc.local can't launch my program (raspbian linux)

I have a c++ program that is running perfectly fine if I run it by executing, sudo /Morreels/./launcher Sadly the same line (without sudo) won't work in the rc.local file on startup... When trying ...
3
votes
1answer
27 views

What are semi-files?

I'm reading a paper about Android/Linux. It contains a line I'm not able to understand. I tried searching about "semi-files" but nothing relative came up. Can someone please rephrase it or explain it ...
0
votes
0answers
14 views

Keep all jars in a folder running on jvm's as services [migrated]

On a remote server I'm having a folder which contains serveral jars. Each of it will represent an application, which will open up a port, on which a web-application is served. It might look like ...
1
vote
1answer
41 views

Strange lines in /var/log/message folder of Centos machine

Below are lines from my /var/log/messages. Can someone help me to understand what these lines mean? I am running a syslog server on this machine. I want to know if these messages would stop the ...
4
votes
3answers
462 views

How do pipes and infinite streams work?

I usually use command1 | command2 | command3 a lot in Linux but most of them are dealing with definite content. When I tried this with an infinite stream cat | sed '' | sed '' which hopefully ...
0
votes
1answer
37 views

How to forbid ssh connection after sudo -u

After ssh login, user with UserName makes $ sudo -u localusername -i and $ ssh localusername@someserver How to forbid ssh localusername@someserver for UserName via sudo -u localusername but permit it ...
0
votes
1answer
799 views

two NICs in the same subnet— need to set up routing

I have a tricky case: +---+ +----+ |D1 +->eth0---------<-eth0-+D2 | | | | | | +->eth1---------<-eth1-+ | +---+ ...
1
vote
1answer
327 views

OpenVPN not showing easy-rsa

wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -Uvh epel-release-6-8.noarch.rpm I did yum install openvpn in the guide then did the following: mkdir -p ...
0
votes
0answers
35 views

Linux + what are the steps use the oldest kernel version in place of the current

I have Linux red-hat 5 version I want to reboot the machine with the previous kernel - 2.6.18-408.el5 so I set the default to 1 but before I will reboot the machine to startup with the older kernel ...
0
votes
1answer
793 views

java.lang.UnsatisfiedLinkError: libawt_xawt.so: libXi.so.6: cannot open shared object file: No such file or directory

I am trying to run an executable on remote Linux through Putty (SSH). When I run the executable on remote Linux through Putty I get the following error: Exception in thread "main" ...
0
votes
1answer
30 views

Having problems updating after esx host problem

So I have a VM that had to be hard shutdown. I can't get the error to stop. CentOS 7.x latest [user@asm-dmz01 ~]$ sudo yum-complete-transaction --cleanup-only Loaded plugins: fastestmirror Loading ...
0
votes
0answers
35 views

Z170-A motherboard HDMI video issue with ubuntu

I purchased Z170-A motherboard PC with on-board HDMI port and i have installed Ubuntu 14.04.4 OS but problem is if i connect Monitor to HDMI port it's not working. but if i put external VGA card it ...
1
vote
2answers
59 views

How to move from one filesystem to another without changing directory structure?

/dev/xvda1 is full so I want to move its contents onto my 30GB udev filesystem. Filesystem Size Used Avail Use% Mounted on udev 30G 4.0K 30G 1% /dev tmpfs 5.9G 768K ...
1
vote
0answers
24 views

Raspbian Jessie Lite “Factory Reset”

I am currently remoting offsite to my Raspberry and since I think I messed up all packages and configuration files I would like to return to default settings before installing all the packages and ...
4
votes
3answers
2k views

Discrepancy between reported used memory and sum of application memory usage

I'm running a desktop system that quite regularly suffers from lack of memory, this prompted me to investigate what causes the issue in the first place. Problem is, there's no single process that ...
2
votes
1answer
23 views

Packing a bootloader as kernel image

Can a bootloader (lets say lilo) be packed as a valid zImage to trick other bootloaders to chainload another bootloader? Sorry about my english and excuse me if I am not clear enough.
20
votes
5answers
75k views

Using the not equal operator for string comparison

if [ "$PHONE_TYPE" != "NORTEL" ] || [ "$PHONE_TYPE" != "NEC" ] || [ "$PHONE_TYPE" != "CISCO" ] then echo "Phone type must be nortel,cisco or nec" exit fi The above code did not work for me, so I ...
0
votes
0answers
14 views

UUID of LUKS changes when cloned

I am trying to install Centos 7 (under LUKS) on a virtual machine in Fedora 23 using virt-manager and after that to clone that image to multiple USB drives. The problem is that the virtual machine ...
5
votes
2answers
3k views

How to assign an additional IP/hostname to a chrooted environment?

While I can simply have e.g. sshd in a chroot environment ("chrootenv") listen to a different port than its parent ("parentenv"), it would be more convenient to have that environment have an ...
0
votes
1answer
13 views

How to use systemd-nspawn with pptp?

I would like to set a container use the vpn for only network interface. I have used the pptpsetup and pon make a pptp connection works, and got a ppp0 interface. Now, I want all internet connection ...
2
votes
1answer
46 views

Is there a purpose to a symbolic link that points back to the directory containing it?

When Gogs docker installation is run it creates a symbolic link /data/git/git that points back to the parent folder: lrwxrwxrwx 1 1000 1000 9 May 13 19:37 git -> /data/git I'm ...
2
votes
1answer
80 views

How can I mark a flow with iptables?

I read this tutorial, however I am considering a method to load balancing for Internet connection by applying iptables rule on 2 interfaces. The following is my iptables rule. #!/bin/sh ...
0
votes
0answers
17 views

cups restarted automatically

I have installed a cups service on a CentOS 7.1 64 bits. We have some problems with a printer and the only thing I can see on logs is /var/log/messages: May 18 12:11:37 isis systemd: Started CUPS ...
0
votes
0answers
22 views

What is the purpose of the symbolic `git` link inside the `/data/git` folder of the gogs docker installation?

Initially I asked this as a more generic question here: Is there a purpose to a symbolic link that points back to the directory containing it? Since it relates to gogs specifically I'm asking for a ...
2
votes
1answer
64 views

FFMpeg : Converting a video file to a gif with multiple images from video

I am working on a project in which the user can upload videos. Is there any way with FFmpeg I can take some images from the video and create a GIF out of it? As the project is in Java, I have a way ...
12
votes
4answers
5k views

How can I determine the fs type of my current working directory?

I need a platform-independent and lightweight way of detecting the mount type of my CWD. Specifically, I need to determine if my CWD is in an SSHFS, NFS, CIFS, SMB, or local block store mount. I need ...
9
votes
3answers
4k views

Small Distributed Computing Cluster

I'm a high school student trying to build a linux cluster for a project (I have a bunch of decent computers slated for re-image this summer, so the tech department basically says as long as I don't ...
3
votes
2answers
63 views

How to locally validate DNSSEC?

I want to simulate the process of chain of trust validation locally , I do the following :- 1) signed my zone. 2) unbound installed , but i can not configure it for DNSSEC validation could you help ...
14
votes
6answers
15k views

How to know number of cores of a system in Linux?

I wanted to find out how many cores my system has. So I searched the same question in google. I got some commands such as: $ lscpu command. When I tried this command, it gave me the following result: ...
0
votes
1answer
28 views

Sensu remediation : not able to trigger client

I am a newbee to Sensu remediation i tried to restart process with custom script Senario: if my http link goes down then i use to manually run the script and start it. we moved to Sensu recently as ...
137
votes
21answers
130k views

How can I get my external IP address in bash?

I need to find my external IP address from a bash script. At the moment I use this function: myip () { lwp-request -o text checkip.dyndns.org | awk '{ print $NF }' } But it depends on ...
-1
votes
0answers
13 views

MongoDB Shell Commands

i want Run shell command(s) from MongoDB , i connect to My MongoDB With MongoVUE now i want execute shell Command like ls -l can i do it From MongoVUE ?