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

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16 views

Linux User Management Best Practices [on hold]

I am a long time Windows administrator and I am working on moving into Linux. One thing that I really like about Windows is the ability to use Active Directory as a central user\group repository. I ...
1
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1answer
17 views

SNMP - snmpwalk does not return textual OIDs

I have snmpd running on an Ubuntu Linux system with a simple /etc/snmp/snmpd.conf: rocommunity public snmpd is listening on localhost. From the same system, I am running: snmpwalk -v 1 -c public ...
-1
votes
1answer
21 views

404 Not found - Apache CentOS

I am running CentOS 5.11 with apache/2.2.3(named) server. I am able to view my site homepage, so I can confirm php is running correct. However when trying to naviate to one if the pages like ...
0
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0answers
15 views

Linux: iptables and marking confusion

Before I ask my question, let me first pose the situation: I have 2 network interfaces: eth0 and eth1 I bridge those 2 (using brctl) and form a new interface: br0 This bridge gets the ip address ...
3
votes
1answer
122 views

How can I remove “Red Hat Network Code” from the RedHat?

The question is: How can I remove "Red Hat Network Code" from the system and what this "Network Code" actually is? The background of this question is related to the RedHat subscription as according ...
1
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0answers
16 views

System not being able to handle soft interrupts but having idle time?

I have a constant 5% and more CPU time spent in handling soft interrupts. Doe to that, the ksoftirqd is running almost constantly, but is using a very small amount of CPU (less than 1%). However, ...
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0answers
20 views

high CPU usage due to monitoring agent? [on hold]

The server CPU load is very high. Does the monitoring agent has some isseus with it? # tail /var/log/messages Dec 22 19:06:33 ctiserver_1 xinetd[7035]: START: nrpe pid=5707 from=192.168.1.111 Dec 22 ...
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1answer
21 views

how to watch certain directories based on pattern for changes (inotify) [on hold]

Is there any way that i can watch a whole /home directory in cpanel, and in case any directory in it with name ".spam" has certain event triggered on it, take action against it? (run a script). ...
0
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0answers
6 views

CROSS compilation of BTRFS file system [migrated]

We are developing Beaglebone black based custom board, We are planing to use eMMC for storage. To decide the file system on the eMMC we want to cross compile Btrfs user space utility, Does anyone know ...
2
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0answers
43 views

Current state of Tinc 1.1? [on hold]

So as probably any Tinc user ( www.tinc-vpn.org ), I noticed there are two versions: 1.0 and 1.1. On the website is explained that 1.1 is the stepping stone for 2.0 and that it has a lot of neat ...
3
votes
1answer
49 views

Postfix SMTP relay server

I use gmail to receive e-mails both from my gmail address and my own domain, but gmail no longer allows you to send e-mails from your own domain name unless you provide your own SMTP server to send ...
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votes
0answers
70 views

MDADM not showing RAID5?

Background: I own a Blackarmor NAS 440. I set up 4 brand new 3TB Seagate drives in RAID 5. It has been working fine for ~2 years, until this July. This is what happened in July : HDD3 failed. I ...
1
vote
3answers
70 views

mount a root disk in mnt

How can I mount a root virtual disk from another VM on my CentOS ? In order to change some files on it, not to use it as a real root disk. there are 2 partitions on my virtual disk : /boot (Linux ...
-1
votes
0answers
17 views

RHEL/CentOS - hugepages configuration for Oracle DB

I am going to use hugepages on my RHEL6. I have 6 Oracle db instances on it. SGA are configured and memories parameters setted to 0. I would like to know how to calculate the value to use for ...
0
votes
2answers
57 views

How can I access the bios remotely on a desktop computer acting as a server? [on hold]

What are the options for having remote control via network of a computer even down to the "bios" level. I've seen Dell's DRAC / Out-of-band management that they have for their servers, and typically ...
1
vote
1answer
17 views

libvirt - Restart VMs after return from power failure?

Is there any way to make KVM automatically restart any VMs that have been shut down due to power failure? Here is my scenario: I run a small VM tank, mostly with development VMs on it. I now have a VM ...
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0answers
13 views

Does Ubuntu with Linux 3.5 having TX RX ring buffers or BQL

My linux uname -a command outputs: Linux Davinci001 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux So, does NICs with this Ubuntu machine is ...
2
votes
1answer
14 views

Remote end of IPSec transport is 'permenantly glued' to loopback after some messing around with GRE

So, I have managed to get IPSec transport over ESP between two hosts using racoon: the 'local' host, 1.1.1.1, and the remote, 2.2.2.2. It only worked for ICMP (other traffic ignored the SA), but ...
1
vote
1answer
25 views

How to clone image and data for VM on Azure?

I'm trying to find a way to clone the image of one VM on Azure. I knew some information about 'sysprep' and Linux system, but those require delete the previous VM. In my case, I don't want to delete ...
11
votes
3answers
658 views

Enable SSH shell access but disable SFTP access

I've searched for a viable answer to this question, and most of the answers include advice on why to not do it. However, here's the scenario, and what makes it necessary: I have a console app, and in ...
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0answers
22 views

After cpanel install on linux cannot access WHM [on hold]

I am very new to this and need some assistance. I have a dedicated server running centos6.5. I installed cpanel onto the server this morning. First i had issues with the domain name on the server not ...
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votes
1answer
37 views

Determining the old MX record [duplicate]

Our sysadmin created our mailserver years ago before he left. We recently decided to use gmail as our mail app and they required us to change the MX record to point to them on amazon route 53 app. I ...
0
votes
1answer
26 views

Moving MySQL files from Mac to Linux

I had a mysql server running on a Mac. Unfortunately, the Mac died. However, I got a backup. I am now trying to restore the server on a Linux machine. I have moved the mysql files located in ...
1
vote
1answer
31 views

SSH from Windows to Jump Server to MySQL [on hold]

We have a MySQL instance running on a Linux machine and had to open a tunnel to access the server. This worked fine until admin decided to add a steppingstone / jump server. Now i can't seem to ...
0
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0answers
30 views

Finding and renaming directories by regex in linux

I'm trying to match (and later rename) directory names like: A0000 (SOME-NAME) A0001 (SOME-OTHER-NAME) A0001 (ANOTHER-NAME) I'm testing to see if I match any using the find command but doesn't seem ...
0
votes
2answers
44 views

TCP - TAP performance

Linux. Is there a performance loss from using a tap device vs a hardware one like eth0 ? The goal is to create a user space tcp/ip stack and avoid the kernel as much as possible. I would like to be ...
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votes
1answer
45 views

Population of /etc/resolv.conf upon new server installation [on hold]

I purchased two Linux servers that have CentOS preinstalled. One was bare whilst one has many other common packages installed(httpd, bind, mysql, php). I purchased one of these servers with 2 ...
0
votes
2answers
32 views

Generate report/histogram of file access counts on Linux [on hold]

I would like to generate a report or histogram of file access counts, for every file accessed while a process is running. ...And not just files accessed by that process, but ideally all ...
9
votes
1answer
73 views

Share /home between datacenters

I have two servers, placed at datacenters in holland and france. Both are running Debian Wheezy. I need to share /home between them, with good performance. There are 300-something users on the ...
-4
votes
0answers
19 views

Understanding the different IP's setup in my core server files- Confusion [on hold]

I am running CentOS 5 with BIND and httpd, using PuTTy to connect via SSH. I login to SSH with IP 200.100.107.187 and can access my server through a webbrowser also at that IP This IP is the one my ...
1
vote
1answer
21 views

Openvpn failover setup - Routing to clients with static ips

I have a setup with an openvpn server and many clients connected to it. All those clients have fixed ip addresses, derived from their certificate name. Behind the openvpn server, I have a management ...
0
votes
0answers
13 views

cannot open assembly certmgr.exe

I'm trying to run a basic console app that calls a web services hosted on an external https endpoint using Mono. I keep getting errors about decrypting the response. Some googling has led me to ...
1
vote
2answers
36 views

Use OpenVPN tun device for specific request

I have setup an OpenVPN connection with the route-nopull configuration. So now no special routes have been added to the client's configuration and only a TUN device is created, like so: tun0 ...
0
votes
0answers
22 views

creating a custom service on ubuntu [migrated]

I am setting up an ap called scumblr (https://github.com/Netflix/Scumblr/wiki) The final step calls for initiating the server using the following 3 commands: redis-server & ...
0
votes
2answers
47 views

Yum installation fails with RHEL 6.5

I am trying to install shibboleth SP package using YUM installation (Yum install shibboleth). I am getting the following error while installing. Downloading Packages: ...
0
votes
1answer
18 views

Setup openvpn as interface device only

I just setup OpenVPN client using this guide on The Geek Stuff But now (somewhat as expected) all my traffic is routed through the VPN. I actually just want to set up the interface device. Does ...
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votes
1answer
23 views

Doesn't NFSv4 have no_root_squash?

When I in /etc/fstab have nas:/tank/nobackup /mnt/nas nfs exec,nosuid,rw,bg,soft 0 0 then mount -a; mount gives nas:/tank/nobackup on /mnt/nas type nfs ...
0
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0answers
8 views

Rename files in selected folder in Linux [migrated]

Command for rename file as IMG0001 to 4R0001 in folder for f in *;do mv "$f" `echo "$f" | sed 's/IMG/4R/g' `; done AND I just want rename selected folder /tmp/2014/1201 (rename files) ...
-2
votes
0answers
22 views

log error in centos7 [on hold]

I'm just a beginner in linux base opreation system. I delete a log folder(log folder and all the sub folder within log folder) under var folder because it take 19GB of my hosting. And here we got the ...
9
votes
2answers
936 views

SSH MOTD per user

I want to display banner (welcome message) for SSH users with a specific welcome message for each user.
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votes
0answers
60 views

Creating zones and editing named.conf - Centos [on hold]

I am running CentOS, with bind(BIND 9.3.6-) installed, and accessing via SSH with PuTTy. My goal is to setup a nameserver for my domain d.org on my dedicated server 44.44.44.44 which also hosts the ...
1
vote
1answer
24 views

ttyS0 acting strangely: how to reset it without rebooting?

I've got a Redhat box whose serial console (dev/ttyS0) is acting strangely. Firstly, it is echoing all input, including passwords typed at the login prompt. Secondly, running stty sane or other stty ...
1
vote
1answer
35 views

Is Linux limiting my application's UDP transfers, and how can I see it?

I am currently developping two applications to work over a custom video streaming "protocol". Basically: The server captures video frames from a webcam, slices them into parts, and sends these parts ...
-1
votes
0answers
12 views

Disabling autoenabled hotkeys while in Cinnamon fallback mode (in a RDP session)

I connect via a Windows 7 machine via RDP to the server (running Linux Mint 17); I authenticate, it launches into fallback mode (pretty standard). However, when I type certain letters, like 's', the ...
0
votes
0answers
17 views

Avoid unexisting subdomains to show main domain

I have a site example.com, and I made a subdomain test.example.com, both work just fine. The problem is that if someone now surfs to an unexisting subdomain like puppy.example.com he still gets to see ...
3
votes
2answers
25 views

logrotate not emailing log

My logs are being rotated properly, however, I am not being emailed the rotated log. What am I doing wrong? My main logrotate.conf is: include /etc/logrotate.d here is my ...
0
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0answers
16 views

Vestacp custome nameservers [closed]

I am using vesta control panel, as per their documentation, i have created custom nameservers, here what i did... I have registered both nameservers using 2 different ips at my domain registrar. I ...
1
vote
0answers
23 views

The default value for vm.dirty_background_ratio

Wondering why the default value for "vm.dirty_background_ratio" from Linux Server (CentOS and Ubuntu) is set to 40. Is this just a recommendation for safety? Or is there any particular reason why? ...
1
vote
1answer
32 views

generating ssh-keys for a non root user with salt

I need to generate ssh-keys(public/private pair) for a user say helen. This user is already in all my salt minions. How do I generate ssh keys for this user from my salt master? For root user I ...
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2answers
37 views

How to check HDD in Linux for bad blocks

Since 2 days one mysql server can't start. I get this every 5 secs in the syslog: Dec 17 09:24:35 backup kernel: [ 681.132013] ata2.00: exception Emask 0x0 SAct 0x50000 SErr 0x0 action 0x0 Dec 17 ...