Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.

learn more… | top users | synonyms (3)

0
votes
0answers
11 views

OSSEC won't start, Error: queue not accessible

I'm trying to set up OSSEC on a CemtOS 6.5 server. This is to be installed as an agent, not a server or local instance. The package successfully installed and I created the clients.key file, but when ...
0
votes
1answer
49 views

Linux Unraid route traffic through different interfaces

I have two interfaces: eth0 and tun5. eth0 is an ethernet to a router and tun5 is a VPN tunnel. These are on an UnRaid server, which is based on Linux. It's a headless server so I access it via SSH. ...
0
votes
0answers
15 views

Struggling to configure Samba for public sharing with a private sub-directory

My goal is to end up with a Samba configuration whereby all users on the local network can have read/write access to the shared directory but within the shared directory there is a sub-directory ...
0
votes
0answers
44 views

Is it fair to compare a 2XL AWS instance to a similar setup on a rack server?

I'm trying to create an extremely basic model of what a setup in Amazon Web Services might look like translated over to an on-premises cloud. I'm aware that Amazon is quite SAN-reliant, and pretty ...
-2
votes
0answers
46 views

Reboot to new kernel version Linux command

I have 4 kernel versions installed in my machine. I want to reboot my machine to one of them, which is different from the one currently running. Does anyone know the command needed to switch to the ...
0
votes
0answers
24 views

Allow a user to access a single Git repository

Consider a server that hosts several Git repositories: $ ls -l /opt/git/ drwxrwxr-x 7 ubuntu root 4096 Jan 2 2014 george.git drwxrwxr-x 7 ubuntu root 4096 Dec 29 2013 john.git drwxrwsr-x 7 ...
3
votes
1answer
26 views

In tar how can I exclude dir contents but leave empty dir

I want to create a tar file excluding certains folders who have many sub-folders and files, but leaving only the main folders that's being excluded. Explaining: -project |-dir1 |-dir2 |-cache ...
-2
votes
2answers
28 views

How can I estimate the request/second my server is capable of? [closed]

I recently built my own server to help me learn linux, Ubuntu and related technologies and to serve some small website projects I have been producing. How can I estimate the requests per second that ...
-3
votes
3answers
61 views

SSH on linux | CentOS [closed]

I have a Linux server using CentOS. I have changed the SSH config to make it a little more secure, First I changed the from from default 21 (or 22?) to 34786. This way if someone tries to hack in at ...
2
votes
1answer
29 views

start linux installation from a linux

Need to network install ubuntu/centos after preparing RAID/BIOS/Firmware. Right now, a machine first boots into a tiny linux kernel(resides in memory) and run scripts handling all the above hardware ...
0
votes
0answers
18 views

How to enable sites by domain wildcards in Squid Guard Proxy Server?

I need to enable sites through Domain names by using wildcards in SquidGuard Proxy Server instead of adding one by one. For example, *.ae means it needs to allow all the sites comes under ae domains.
1
vote
0answers
22 views

Decompress lrzip on Windows [migrated]

I've happened upon lrzip as a compression tool, which compared to gzip, the compression was insane. lrzip compressed a 300MB text file to 7MB where as gzip only managed to get it to 100MB. I've ...
1
vote
1answer
26 views

Setting up root directory of nginx in Fedora 19

So I had nginx set-up with the default site. I decided I wanted to change because my website is at /var/www/site/... so before I changed again, I went to 127.0.0.1 to see if everything worked. I did. ...
-1
votes
3answers
37 views

Determine if IPs are backed by VPS

Is there any way to determine if IPs are backed by actual VPSes? For example, a VPS host receives a /22 block of IPs. He puts them on his server and requests more, but you want to verify that each IP ...
-2
votes
2answers
35 views

Allowing windows machines to ping Linux Box by Hostname

I have a linux box that I would like to be able to ping by its hostname. All of the windows machines are on the same domain. At the moment I have used beyondtrust free (likewise open) to join the ...
-1
votes
1answer
105 views

Can't mount disk (VFS: Can't find ext4 filesystem)

Tried to mount a disk (hardware raid) but failed. #mount -t ext4 /dev/sda /data mount: wrong fs type, bad option, bad superblock on /dev/sda, missing codepage or helper program, or other ...
1
vote
1answer
27 views

vSwap vs Burstable RAM for OpenVZ

What is the big difference between vSwap and Burstable RAM? Does vSwap create and cause I/O by using disk? I know SWAP will use the disk so is vSwap the same as swap just virtualized in the ...
-1
votes
0answers
35 views

Linux server apache httpd processes take i/o wait to close to 100% and lock down server

For about 5 days now, and seemingly out of the blue, my linux server has started locking up from time to time. The pattern is always the same as far as I can tell from top and iotop commands around ...
2
votes
3answers
161 views

How can I deploy template-based VM from Linux?

We are trying to provide our Linux engineers with a CLI to deploy VMWare vSphere VMs using templates. The vSphere CLI looks promising but the documentation doesn't mention templates. Does anyone ...
-1
votes
0answers
32 views

RAID bus controller: Intel Corporation 82801 SATA Controller

I have a build server with a soft raid controller and two 250GB drives running Ubuntu 12.04: # lspci ... 00:1f.2 RAID bus controller: Intel Corporation 82801 SATA Controller [RAID mode] ...
0
votes
0answers
34 views

Jenkins SSH slave fails to create /home/<user>/jenkins

When configuring an ssh slave on Jenkins, which runs on an ec2 instance, I get the following error message when I click on the "Launch Slave Agent". [08/06/14 18:41:46] [SSH] Opening SSH connection ...
0
votes
1answer
25 views

Problems with a PHP include from the command line (or cronjob) [closed]

I am trying to setup a cronjob on my AWS EC2 instance. There is nothing wrong with the actual entry in the crontab file but when I try to run the command in the command line I get this response. PHP ...
1
vote
2answers
51 views

Xen PV, Xen HVM and KVM

Am I correct that you can boot up any operating system with either of these virtualization types as they act as a bare metal machine and compile your own kernel? I am looking to switch over from ...
0
votes
1answer
35 views

How to load new profile in Network manager v0.9 without nm-connection-editor using cli?

i'm working on migration of autoprovisioned Ubuntu 12.04 LTS servers from ifup (/etc/network/interfaces) to NetworkManager. /etc/network/interfaces is clean (only loopback interface is configured): # ...
0
votes
1answer
75 views

GRUB does not load OS, displays grub> prompt

I have booted my server, getting some GRUB error and I pasted the error below. Error Code:- GNU GRUB version 0.97(502k Lower/496556K upper memory) [Minimal BASH-like line editing is supported. For ...
1
vote
2answers
27 views

Iptables does not seem to be applying SNAT to packets sent on a raw socket

I'm sending packets from a user space program to my wireless interface wlan0. I've set up a SNAT rule with iptables as follows iptables -t nat -A POSTROUTING -o wlan0 -j SNAT --to 192.168.1.3 And ...
0
votes
1answer
40 views

How to rescue deleted partition table on drive?

I accidentally dd the first 512 bytes using dd if=/dev/zero of=/dev/sdb bs=512 count=1 and the partition table is now gone. Is there ANY way to re-create the partition table. My hard drive is ...
3
votes
3answers
155 views

Service is not starting on Centos on boot

I have a service installed to start jasper reporting server on boot. I believe it is correctly setup. here is the startup script placed in /etc/init.d/jasperserver #!/bin/sh ### BEGIN INIT INFO # ...
2
votes
1answer
105 views

Unable to mount '/dev/sda'

My server has two 2 TB hard disk drives in soft RAID 1. I can't mount /dev/sda. Output of parted -l root@rescue:~# parted -l Model: ATA HGST HUS724020AL (scsi) Disk /dev/sda: 2000GB Sector size ...
4
votes
1answer
136 views

Setting up IPTables

I am trying to remove a router from our product and replacing all its functionality with the use of iptables. The system is required to perform general traffic control as well as forwarding data to ...
-1
votes
0answers
13 views

service postfix status = -b (pid 11289) is running

Before integrating mailscanner and clam antivirus the output of service postfix status was => master (pid 12151) is running... after integration the output of service postfix status is => -b (pid ...
1
vote
2answers
88 views

Simple, decentralized, automatically synced, local cached file share for linux server

I wonder if someone could recommend me some solution to sharing files between a small amount of linux VPS (virtual private servers). Basically I have a bunch of linux VPS to manage, and I want to ...
0
votes
0answers
24 views

Signed NTP authentication

Using ansible, I have setup several Signed NTP servers around our network. The servers themselves are Virtual Hosts running on CentOS 6.5. I have the virtual machine guests on each host contact their ...
2
votes
2answers
134 views

How to free linux memory safely to improve server performance

We have a linux virtual server hosted through GoDaddy, and our site has been running slow recently. I poked around the server a bit (I am not a sysadmin and have very limited experience with linux, ...
0
votes
2answers
51 views

Apache web server intermittent stalls

Our SOAP web server is running in PHP on Apache on CentOS and makes heavy use of MySQL. There is heavy demand on the server - most requests are very small and involve only two or three MySQL queries, ...
0
votes
0answers
41 views

Block outgoing connections on RHEL7/CentOS7 with firewalld?

RHEL7/CentOS7 features a new firewalld firewall service, that replaces the iptables service (both of which use iptables tool to interact with kernel's Netfilter underneath). firewalld can be easily ...
0
votes
4answers
50 views

Proper way of interpreting system load on a 4 core 8 thread processor

As we all know, load of 1.00 on a single processor means that there is a load of 100%. Analogically a 4.00 load on a quad core would be 100%. How should I interpret load on a 4 core 8 thread ...
-3
votes
1answer
19 views

Secure Copy of Directories and / or Files To a Linux Server [closed]

When copying files or directories to a Linux server, what is the difference between 'scp -r' and 'scp -R'?
1
vote
1answer
29 views

Need linux milter solution to log email body into database

We exchange emails with various clients and vendors. I am trying to implement a solution where all the email communications between our rep and the client or vendor is saved in our database so in our ...
-2
votes
0answers
18 views

Can I allocate free space and create new partition from mounted logical volume? [duplicate]

This is the current state of my logical volumes: # pvs -o+pv_used PV VG Fmt Attr PSize PFree Used /dev/sda2 vg_ecomwise lvm2 a-- 465.27g 0 465.27g # lvs -o+lv_size LV ...
0
votes
1answer
47 views

MySQL Master-Master Replication Issue

I have two databases that sync data through Master-Master replication. The setup was created using the following guide: ...
10
votes
3answers
435 views

There is nohup, is there a nousr1 command?

Several of my regular programs crash (on a regular basis) with the message "User defined signal 1". I know there is a nohup command, but is there a nousr1 command? Or something which will do ...
0
votes
2answers
35 views

Raid 1 can not sync with new Drive . its stopping at 30 %

i had trying to add new HDD in place of Falty HDD. but new HDD can not sync with old one .sync process shown up to 30 % after that its stopped . cat /proc/mdstat Personalities : [raid1] md2 : ...
-2
votes
1answer
28 views

Users unable to connect due to an unknown plausible reason [closed]

========================= Warning: Long thread; includes a lot of information to give you some basic understanding of my issues. If you rather not read it, then here are my questions: 1) Does Linux ...
-2
votes
1answer
40 views

How do I recieve incoming mail on an email address in Linux [closed]

Background: My department does a lot of communication using email to ask and answer questions. We have an internal StackOverflow type board set up but it's a headache for them to log in to the VPN and ...
0
votes
0answers
32 views

Varnish “it works” page on all domains

I installed Varnish on my virtual server(Debian 7.0 x64) Digital Ocean and I followed their tutorial here. The problem is that on all my domains and subdomains, I get the it works message. I tried ...
-1
votes
1answer
67 views

Can Linux cloud servers be used for render farms [closed]

Can Linux cloud instances (e.g. on Digital Ocean or Linode) be used for own, on-demand render farms? Are there any open source solutions for "slave" servers? EDIT My research didn't lead me to ...
0
votes
0answers
5 views

Can't get out of foreground mode in STunnel [migrated]

I was trying to debug an STunnel installation on my Raspberry Pi (using Raspbian) and so I set the foreground mode to yes (which is something suggested in the official documentation). Unfortunately, ...
0
votes
0answers
26 views

Dell Poweredge R410 does not recognize second CPU

I have a Dell Poweredge R410 with two CPUs installed. I tried everything but the second CPU does not get recognized by the BIOS or the Linux Operating System it has. Both CPUs are Intel Xeon E5602 ...
-1
votes
2answers
40 views

CentOS: Can't add route after deleting the /24 rule from main routing table

As the title says, after deleting a rule from the main routing able I am not able to add any route till I do service network restart or ifup eth0 To reproduce the problem: ip route list table ...