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

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5 views

Mac OS X Ad-hoc Network Certificate [on hold]

I was wondering if on a Mac with the built in "Create Network" feature, to make the client (which will always be an iOS device) accept a .cer file before joining the network. I know some professional ...
0
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0answers
6 views

cloud-init not executing on rackspace cloud

I was trying to pass a bash script to cloud-init on rackspace-cloud with 'nova boot' via --user-data. I used the following command: nova boot --key-name mykey1 --image "Ubuntu 14.04 LTS (Trusty Tahr) ...
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0answers
15 views

Slow 10Gb Networking 300MB's RAM disk Transfer Speeds

I have a dell poweredge 2950 that has 2 Mellanox Connect X-2 10Gb NICS installed in it. They are both in 8x slots. The server has 2 raid0's using SSD's but for testing I'm using an 10gig ram disk. The ...
0
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0answers
7 views

Network Interfaces Cards and rx_short_length_errors and Linux Kernel

My machine (Linux OS) is counting packets with wrong length, it is a huge environment (GW's, Routers, Switches...) , so I would like to understand how NIC's behaving with these packets. -Does NIC's ...
1
vote
1answer
33 views

How should I manage a long running server process on Ubuntu?

I have an app (in the form of a single binary) that I need to run on one of my servers, and I'd like to be able to control its lifecycle properly. What I'd like is the following: simple one command ...
0
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0answers
16 views

Permissions of files and subfolders in /var/www/html (Ubuntu 14.10 + Apache2) [duplicate]

I have some questions about permissions and ownerships of folders and files in Ubuntu Server 14.10 + Apache2. Is it correct that /var/www/html is owned by root:root by default? As far as I read, it ...
0
votes
1answer
29 views

Supermicro super server RAID warning

Hey guys sorry in advance for the noobish question. Our company just received a brand new 6017R-WRF Supermicro superserver. I have been tasked with getting this bad boy setup. I am a software dev ...
2
votes
2answers
34 views

Is an ECC ram enabled GPU necessary for a server, or will a normal gpu work fine in a server?

Is it a requirement for a server to use ECC ram on a GPU while the normal CPU ram is ECC? Im thinking that instead of using a Quadro k6000 or AMD Firepro, we could use a GTX 980 or AMD r9 290...if ...
0
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0answers
10 views

Mapping right CTRL key to ENTER function

I am using Putty to connect to a Linux server. I am a mainframe person so I really want to map my right CTRL key to ENTER and then map the ENTER key to the NEWLINE function to mirror how the keys ...
-2
votes
0answers
15 views

server performance affected due to node and npm [on hold]

I have a server that is very slow compared to the memory it has. https://gist.github.com/shantanuo/ac80790c67cc1cca76e9 I can see several node and npm processes. Are they affecting the performance?
0
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0answers
18 views

Run server on home PC [on hold]

I am newbie. I have static IP address. Is it possible to serve my web site on my local PC.While registering domain I have to specify NS server. I don't clearly understand what is the purpose of this. ...
-1
votes
1answer
10 views

Can we run thin client to connect to Linux (Suse or Ubuntu)

Not sure where to ask such questions, so guide me on that! I am looking to have several thin clients to use same server (system), the work involved is mostly office and browsing related works - that ...
0
votes
1answer
27 views

Linux centric backup solution for NTFS target

I've got to backup data (around 100GB) on a linux system on a daily basis. I need daily incremental and regular full backups on an 2TB USB drive that is NTFS formatted (no way to change that). If I ...
-3
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0answers
19 views

remove lines from a file based on whether corrersponde to a list of names [on hold]

could help to create a perl script to delete a line file based on a specific name , eg if I want to delete me from node 1 and node 4 and its contents until you find another based on one ready names eg ...
1
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0answers
23 views

Unable to boot into software RAID1 after disk failure

Today after restarting my data server I was unable to boot because one of the drives wasn't being recognized any more, it is still spinning when I connect it and not making many weird noises except ...
1
vote
1answer
51 views

firewalld vs iptables - when to use which

TL;DR On new CentOS server installs should I be using firewalld or just disable that and go back to using /etc/sysconfig/iptables ? firewalld and iptables serve similar purposes. Both do packet ...
0
votes
1answer
37 views

Why is linux not listing the IP I want?

I have a linux based cluster (using openMosix). The machine intended to be used as a server has 2 network cards. Cluster is working, and all machines ping to each other inside the cluster (internal ...
0
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0answers
27 views

Kerberos, Active Directory, and Linux/Unix Servers

I have done some research on the topic, but I can't quite find a straight answer to my question. Please tell me if my understanding is correct. Kerberos can be used as the bridge between a ...
0
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2answers
53 views

Can a Linux Kernel be shared between two operating systems?

Quite simple question. I am working on a project to have multiple operating systems (all linux) on the same machine using btrfs subvolumes so that the user can boot to the environment they are ...
1
vote
1answer
29 views

Need advices on iptables

Helly guys ! :-) . I need a (several?) advice(s) from you about my iptables setup. I'm pretty new to iptables, and this is the first time I configure a server with iptables ONLY as a firewall (we ...
2
votes
2answers
14 views

How do I request a certificate from CEP / CES on a Microsoft CA on OSX or Linux?

This article describes how to request a certificate from AD CS (Active Directory Certificate Services) from a non-domain joined windows computer. I would think the same principals apply to non ...
1
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1answer
29 views

Suddenly error='Cannot allocate memory' (errno=12) [on hold]

So this morning I noticed my website is down, went on my server and saw that the webserver has been stopped. When I try to start it again I get this error start -Dhttp.port=80 ...
0
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0answers
18 views

Plain (remote) Linux desktop on my VNC Viewer? [migrated]

So for some reason my VNC Viewer is not showing any desktop icons on the remote Linux. I remember it first happened after I clicked on the button "Quit this session". I am using putty as a terminal ...
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1answer
25 views

How to change volume mount

I have two volumes in my EC2 ubuntu instance: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvdb 202:16 0 40G 0 disk /mnt xvda1 202:1 0 400G 0 disk / I want the 400GB one to be the main ...
0
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0answers
21 views

Server making outbound dns requests [duplicate]

I have a cloud server with Rackspace and they have blocked DNS because of "excessive queries". I can find the info below when running ps, but I can not seem to locate where the file is that is making ...
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1answer
16 views

SELINUX blocking php-fpm and nginx working together?

I'm having some issues with SELINUX. When trying to visit my website I get 403 forbidden from nginx and the server pops up with an error and says to use grep NGINX /var/log/audit/audit.log | ...
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votes
1answer
34 views

Does swap on 32-bit OS with 4 GB make sense? [on hold]

Does having swap space makes sense if I have a 32 bit OS (Linux) and 4 GB RAM already? As it would have to be addressable with a 32 bit address, which are already all "used up" by the RAM, would ...
0
votes
1answer
19 views

How to automate input for a repetitive script! Expect in Bash?

I am a junior sys admin. Reason I'm asking this question is because we don't have a senior sys-admin here who is proficient with scripting. Senior guys are at the head office and too busy for ...
1
vote
1answer
22 views

Why are ls and locate returning different file names?

We have recently deployed a commit that took a file called MyfileController.php and changed it to MyFileController.php If I navigate to the file's directory and call ls or nano MyFileController.php ...
1
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0answers
9 views

Fail2Ban's [apache-tcpwrapper] jail failing due to missing Apache log entry

I've installed Fail2Ban on two local test systems (Debian Wheezy and RHEL 5.6) and it's working great. However, I'm running into a problem on a third remote RHEL 5.6 system that I can't seem to solve. ...
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0answers
14 views

Linux workstations environment Microsoft equivalent (DC,LDAP, File shareing etc) [on hold]

How can I build Linux (Ubuntu) workstations environment with all the equivalent Microsoft environment, including DC, LDAP, File sharing, login scripts and auto mount shares etc? I tried installing ...
0
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0answers
16 views

setting up iptables dmz for dns (bind9) and web server (apache2) [on hold]

I have a pc server as dns server (example.com) and also a web server inside. I want to access the web server from the Internet using my public IP. What settings should be applied in iptables if the ...
1
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0answers
16 views

Why some apt-get and aptitude installations remove some programs?

I wanted to install wireshark, and I went to Installing wireshark So I just typed on terminal aptitude install wireshark and before it install wireshark, it removed 251 programs, and I don't have ...
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0answers
12 views

getting memory fault error in linux [on hold]

#include <unistd.h> #include "rkspl.h" /*--------------------------------------------------------------------------- * Extern Vars allocated here & used elsewhere or allocated elsewhere. ...
0
votes
1answer
21 views

What exactly happens to packets written to a TUN/TAP device?

I'm trying to send packets to an application listening on eth0 from machine's user-space as if they were coming from a remote machine. What I can't seem to find good documentation for is the exact ...
2
votes
1answer
38 views

Tool for linux file system cache inspection [on hold]

I'm looking for a tool to show what portion of a file is in the file system cache. In the past I have used the fincore tool that is part of the linux-ftools package. linux-ftools isn't in any of the ...
0
votes
0answers
20 views

Partition mounts

I had a problem with a corrupt grub config. I recovered it with Rescatux and was able to boot up. It appears thought that I am mounting the wrong partition because I can't find my old programs. Here ...
1
vote
1answer
34 views

Migrate DNS from Linux to Windows 2008 DNS?

At the moment, the company I work for has an external facing DNS through server 2008 and our internal server points to a Linux server (I wasn't here for the original setup so more specifics are harder ...
0
votes
2answers
40 views

What happens when you update PHP while your server is running?

I'm serving files with Apache and PHP-FPM via FCGI. When I run yum update on a live server, what happens when PHP gets updated? I can imagine three scenarios: php-fpm is stopped, then restarted ...
0
votes
0answers
25 views

Add a class to a puppet manifest file using command-line

Is there any easy way to append a class definition to a Puppet manifest file? For example, I want to add a new vhost to a server defined in a separated puppet manifest, so I want to add: ...
0
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0answers
11 views

Looking for a tool to check bash scripts [on hold]

I'm looking for a tool to integrate with Jenkins CI that will check our shell scripts. I found this tool https://github.com/koalaman/shellcheck. I haven't found any others and I'd like to have one ...
0
votes
0answers
25 views

Tomcat is not starting although JAVA_HOME path is correct

I have linux server in which I run several Tomcats. The current Java I use is 64 bit. All Tomcats use 64 bit java but one. This one Tomcat needs to run with 32 bit Java. If I don't change anything, ...
0
votes
1answer
11 views

WordPress permalinks are not working

I am having a problem with WordPress permalink redirects not working correctly. I was able to specify the permalink convension through settings interface. WordPress properly names hyperlink. However, ...
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votes
0answers
24 views

control users coming in to my web servers

I have two web servers (both installed with apache with Wordpress) and a LB in front of them. let's say web A and web B. I would like to only update the code on web A and leave web B with the old ...
-3
votes
1answer
33 views

Routing on outgoing data packet in linux kernel? [on hold]

I am currently studying iptables. So far all the articles and howtos I have found on google/duckduckgo has only ever mentioned routing on incoming packets (passing the INPUT och FORWARD chain). I find ...
0
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0answers
14 views

Virtual Host showing error 11001 even after chown and chmod

I am trying to create a virtual host to just test a basic html website. Guest OS - Ubuntu 14.04 Host OS - Ubuntu 14.10 In the Host OS, I connect through a proxy server which requires me to enter a ...
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0answers
17 views

modifying a pre-existing file inside an LVM snapshot while the snapshot is mounted,i want to know how the system will do? [on hold]

I guess that it will copy the file which will be changed to the snapshot area,and then modify the file in the snapshot area. Somebody know it ?and where i can get the info about it ?Tks. ps:I read ...
0
votes
0answers
17 views

Google Cloud: Connection Refused upon reset/shutdown

I recently signed up with Google Cloud to host a small VM instance. I created a basic instance with Ubuntu Server 14.04 LTS as its OS, installed apache2, MySQL and Wordpress to it and worked on a ...
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votes
0answers
12 views

Linux Interface Collect Raw Bits [closed]

Is it possible to collect raw bits directly from a network interface? Seems like dd if=/dev/net/eth0 could work?
2
votes
1answer
26 views

How would I be able to take a snapshot of a CentOS 5 server and compare it later on?

I have a consultant that was hired to install some custom software to a CentOS 5 server. After she's done, I'd like to review her changes to possibly automate or optimize them. I was thinking of: ...