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

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5 views

log error in centos7

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 ...
2
votes
2answers
16 views

SSH MOTD per User

I want to display banner(welcome message)per ssh login user, specific welcome message for each user. I Google it but did not find right way to do this. Please help. Thanks.
0
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0answers
7 views

Linux Bridge Network with Static IP Addresses and Firewall

I am trying my luck again here. Any and all help is appreciated. I am trying to set up my Network Map Can you give me advice in setting up my interface file? If I set a static IP on my PLC on the ...
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votes
0answers
21 views

Creating zones and editing named.conf - Centos

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
16 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
28 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 ...
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votes
0answers
7 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
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0answers
15 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 ...
2
votes
1answer
15 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
votes
0answers
9 views

Vestacp custome nameservers [on hold]

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 ...
0
votes
0answers
14 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
21 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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votes
2answers
29 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 ...
1
vote
0answers
28 views

postfix - hock - extracting information out of processed emails

The setup Linux, Debian Wheezy, serves as mail server for about 1000 users. Courier and Postfix installed in this box. Info about the server It is a postfix setup which drops the emails to the ...
0
votes
0answers
20 views

FreeRadius Error reading /etc/freeradius/huntgroups

I've configured freeradius to use sql, everything was working fine, I was doing some tests with the users, and suddenly I cannot start the debugger because of this error: rlm_preprocess: Error ...
0
votes
0answers
13 views

unable to open luks encrypted device (wrong password) [migrated]

I'm using CentOS 7 with a luks encrypted root partition. Usually I have to type my password during boot, but sometimes the system doesn't accept it. It reacts as it was wrong, but it isn't. I did not ...
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votes
0answers
22 views

Linux editing remotely mounted files [migrated]

I have a web server and I mount the directory containing all my website projects onto a local directory in my Linux VirtualBox under /home/UserA/Desktop/Remote/sites. My problem is editing the files ...
1
vote
1answer
15 views

command line alternative to dpkg-reconfigure slapd

Is there a way to reconfigure slapd, providing all configuration options as command-line parameters/arguments? My goal is to be find an alternative to the interactive UI. Thank you
0
votes
2answers
31 views

Automatic archiving of log files [on hold]

I look at my various log files, and I believe the operating system will periodically archive the log by appending a datestamp to it. I've created some custom logs in my httpd.conf file, however, ...
2
votes
1answer
13 views

Migrate Gitlab Database from v6.3 to v7.5?

What way is the best way to migrate all projects, issues, users, snippets and everything else from an old gitlab installation to a new one? Our old machine is a bitnami VM with GitLab 6.3.0 - The ...
0
votes
1answer
26 views

Centralised log monitoring for linux servers [on hold]

I've read several QA on this site about monitoring servers, but I found out, that none of them centralises all the logs I want to watch. To describe my situation: 10 linux hosts Using logwatch to ...
1
vote
2answers
57 views

Performance Tuning Linux [on hold]

Performance Tuning/ Monitoring/Latency keeping in mind I see following 4 items & in each item they are lot of tools. CPU Memory IO Network What I see following tools we do use. vmstat mpstat ...
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0answers
21 views

Fix Linux Log Directory Permission Denied

I just setup a fresh install of Amazon Linux on EC2 and I cannot access the following directory: -bash: cd: /var/log/httpd: Permission denied or -bash: cd: /usr/share/tomcat7/logs: ...
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votes
3answers
54 views

free shows more memory used than top process total

When I run free -m from my centos 6.5 box I am seeing that I only have around 1400 mb of available ram, including the cache. When I do top, sort by memory and add up the processes I am only seeing ...
0
votes
0answers
25 views

Why doesn't Linux strace show activity on a particular socket from java

This has been confusing me for a while now. I have a Java app (specifically, Glassfish, 3.1.2.2). I want to see how it handles the main HTTP socket that is used to for serving HTTP requests. I can ...
-1
votes
1answer
24 views

How to specify a DNS Slave server, that is on a different domain, in the appropriate zone file on the master naming server?

I am unsure if my question makes sense, but I am working on configuring a DNS Master/Slave setup. We currently have two domains. For privacy purposes, I will use "example" as my domain, we have ...
0
votes
0answers
22 views

Utility to list and modify kernel modules loaded during system startup

How do I list all kernel modules loaded while system startup? Is there a user space utility to list and modify the modules loaded during system startup? I am working on RHEL6 Desktop and RHEL6 ...
4
votes
2answers
215 views

Which Red Hat / CentOS updates should be applied and on what schedule?

I'm subscribed to the CentOS-announce mailing list and I've read the definitions of the various severity tags such as Critical, Important, Moderate, Low, BugFix, etc. but I'm still unclear as to what ...
0
votes
0answers
27 views

uWSGI emperor spawning two processes for one application

I did setup uWSGI application, ini file /etc/uwsgi/vassals/test_uwsgi.ini looks like this: [uwsgi] base = /home/fenikso/Flask/Test module = app:app socket = /home/fenikso/Flask/Test/%n.sock ...
0
votes
1answer
25 views

nginx, web page degraded when root path is changed

I'm setting a wordpress up with nginx. Everything's seems ok : server is up phpinfo() test is ok the worpress install routine is showing up The only trouble is the root statement in the web server ...
0
votes
0answers
12 views

Amanda use multiple virtual tapes on different Disks

I am trying to merge a previously working Tape configuration to work with multiple Disks (2HDDs currently) as virtual tapes. We have 2 dedicated drives mounted at /mnt/EXT_HDDS/ARCHIVE_1 and ...
9
votes
1answer
418 views

Linux: How can I view a file's attributes which I set using `chattr`?

I have a file which I wanted to protect from accidental deletion, so I've ran: chattr +i filename Now my question is, once I've changed a file attributes, where can I see the newly set attributes? ...
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votes
2answers
24 views

Call a server Ip simulating domain name [on hold]

in order to migrate my domain name to my new server, I would like to test it with real domain name. I think we can call Ip server giving as argument domain name ? How can I do that ? Something like ...
-4
votes
1answer
40 views

Virtual SAN in Linux [on hold]

I have 4 500GB disks in different servers (remote).. Is it possible to have a 2 TB drive mounted in a 5th server? Just like vmware VSAN.. I believe its possible in linux, but there are still lot of ...
-2
votes
0answers
30 views

Why I am not able to stop this httpd process? [on hold]

I use this command to find the process that is currently listening port 80: sudo netstat -tulpn | grep :80 The result is: tcp 0 0 :::80 :::* ...
-1
votes
1answer
30 views

Cgroups with libvirt/kvm on Centos 6.5

i am trying to limit all the memory used by virtual machines to a particular value. on ubuntu servers setting limit to "libvirt-qemu " solves the issue.But in case of Centos,it creates ...
-1
votes
1answer
32 views

Configure email SMTP Server on Apache2 [on hold]

For a while we decided to use another Server (VServer "B") for our Mailserver. I transfered all email accounts and mailbox from VServer "A" to VServer "B". VServer "B" runs well and the clients are ...
0
votes
0answers
4 views

ST-Ericsson cg2900 driver for gps [migrated]

I'm using ST-Ericsson's chip cg2900, it contains bluetooth,fm, and gps. it's driver, which is a MFD, is explained on this discussion https://groups.google.com/forum/#!topic/linux.kernel/aD_FGvp8D3U ...
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votes
0answers
35 views

syslogd is attached to a remote IP address

I have a hosted server and I have 3 VM's on the server. I did a netstat -antup and noticed this: tcp 0 0 192.168.0.15:37023 73.167.119.19:21333 ESTABLISHED 4039/syslogd Does this ...
-2
votes
2answers
42 views

How do i install another version of PhP?

I would like to have installed WHMCS on my dedicated server. (I already have installed apache2) How do I install PhP 5.4 as WHMCS not support PhP 5.5? WHMCS System requirements: ...
-2
votes
0answers
24 views

Linux have a script download a file on your computer [on hold]

I am setting up a special kind of script for a project that I am working on. I'd like my script, when executed, to take a file that is on the server and put it on the computer. I have no idea how I ...
-3
votes
0answers
22 views

Linux smtp https socket [on hold]

I have a Linux server with Apache, OpenSSL and PHP When i'm trying to send an e-mail to someone from my Gmail account i get this eror... How can i fix it? The following SMTP error was encountered: ...
0
votes
1answer
24 views

Understanding OOM killer logs

I run some processes inside docker container and I use memory limitation for this container. Sometimes some processes inside docker container got killed by OOM killer. I see that in syslog file: ...
0
votes
1answer
33 views

Router accessible from Windows but not from Ubuntu on the same machine

I have a Linksys E900. I can access the internet and its admin page from Windows but not even its admin page from Ubuntu (on the same dual boot machine). Like there is no communication between the ...
-1
votes
0answers
27 views

Route 53 TCP Health Monitoring with NC

We have multiple servers which are running UBUNTU 12.04 OS. We would like to create health monitoring for all of the servers. Since none of the servers are running web server I would like to create ...
0
votes
0answers
13 views

Blindly bridging wireless client with MAC NAT

This is the usual "I want to bridge wifi with ethernet" question, but I need something specific here. My Linux box has a wlan0 interface which is in station mode, with MAC aa:aa:aa:aa:aa:aa, and a ...
0
votes
0answers
11 views

POP and IMAP proxy merging multiple backends

Is there any IMAP+IMAPS + POP3+POP3S proxy available for Linux which can merge multiple backend servers for a single incoming request ? I'm wanting to set up a mail system distributed between 2 ...
-2
votes
0answers
17 views

How to log uploads via website interface in Litespeed Webserver [on hold]

Is it possible to 'log" file uploads via web interface in Litespeed web server?. I'm trying to get a list of uploaded file names, uploaded via WordPress Admin Interface
1
vote
0answers
32 views

Unable to change ulimit setting [migrated]

I edited /etc/security/limits.conf to have root hard nofile 20000 root soft nofile 10000 And added session required pam_limits.so to /etc/pam.d/common-session and ...
0
votes
1answer
23 views

Remote SCP & SSFTP access to linux server denied

This situation is a bit embarrassing but I could really use some help. I took steps to secure my linux server by carrying out the following steps: created and use a different user to use in place ...