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

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2
votes
3answers
58 views

Determine originating process for outbound traffic

I can see that my server is sending out a lot of traffic. If I go to netstat -apln | grep httpd I can see that all the traffic is going to one IP. Is there a way I can see what script / file is ...
2
votes
1answer
2k views

How to tune system settings for mongoDB on Linux?

Trying to squeeze a lot out of one question here -- please bear with me. Although the MongoDB man pages make several useful recommendations about system settings like ulimit ...
2
votes
3answers
1k views

Linux machine does not answer an ARP request

We have this situation: A router, which is an Ubuntu VM, has multiple VLAN interfaces on the same physical NIC. Those VLAN interfaces are dynamically configured and torn down and attached to networks ...
3
votes
2answers
487 views

Is it normal for PID's to be over 65535?

I have a managed VPS running on CloudLinux 6.6 x86_64 standard. It has a few websites with MySQL, PHP and Apache running with CPanel. I am working on a PHP system that needs to manage a PID and ...
0
votes
0answers
28 views

How to reset CPU counters?

I have a Linux server (Debian 2.6.32-46-amd64) which has been online for 117 days. The server is basically an Apache + MySQL, and MySQL was usually at 100~200% CPU usage (using top) being the server ...
7
votes
9answers
2k views

Geographically distributed file system with preferred locality

I'm building a application that needs to distribute a standard file server across a few sites over a WAN. Basically, each site needs to write a lot of misc files of varying size (some in the 100s MB ...
4
votes
1answer
41 views

How do you actually create LVM snapshot?

I'm trying to test LVM, but I failed on first, potentially simple task - create a snapshot. I have following situation: root@debian:~# vgs VG #PV #LV #SN Attr VSize VFree big 1 1 0 ...
0
votes
1answer
965 views

memcached install issues with lib event on server

I've installed libevent on my server in the directory root/data/ and have i'm about to install memcached with ./configure –with-lib-event=/data/; make; make install However, after running a bit I ...
2
votes
1answer
31 views

Different postfix relayhost based on system user?

How do I configure Postfix to send email through a different relayhost based the system user? The current setup has relayhost= set so all mail goes through that smtp server but I would like Postfix ...
-2
votes
0answers
49 views

Convert all received attachments into PDF files [on hold]

I am trying to make my server do the following: Receive email Check for attachments in the email message If there is an attachment; check for the attachment format If it is doc, jpg, bmp, etc ...
0
votes
1answer
3k views

NOQUEUE: SYSERR(root): opendaemonsocket: daemon MTA-v4: cannot bind: Address already in use

I have an issue with sendmail on my server (ubuntu 12.10) with php, mysql,and wordpress installed. Basically I want to create a contact form in my blog to receive emails from visitors directly into my ...
1
vote
1answer
913 views

logrotate is not executing custom shell script in postrotate

I have following logrotate configuration file /home/application/*/shared/log/*.log { daily rotate 10 missingok nocompress notifempty copytruncate sharedscripts postrotate echo ...
2
votes
1answer
33 views

How do I specify what PVs are used for mirroring when adding a mirror in LVM to an existing LV?

I've got an existing VG containing a single LV on a RHEL server that consists of a handful of SAN disks. In an effort to migrate the server to a newer SAN, I'd like to mirror the existing storage to ...
1
vote
4answers
77 views

Is there a visual tool running on Windows that lets me display CPU load etc on Windows and Linux machines?

I would like to have a real time visual status screen displaying the current CPU usage (and possibly memory consumption) for a number of remote machines. These machines will be reachable only using ...
2
votes
1answer
44 views

Why does my linux server resolve all domains (even non-existant ones)

Currently every domain name resolves to my primary server, primary.example.com. So for example, if I ping randomdomain123.blah I get: PING primary.example.com` (1.2.3.4) 56(84) bytes of data. but ...
0
votes
0answers
9 views

Nodejs remote debugging ports closed

I have a problem with nodejs remote debugging. I'm using centos on remote server and phpstorm on my PC. When I open putty: I type in command: node --debug-brk=5858 main_server.js, and the output is: ...
-1
votes
0answers
17 views

Horde groupware: Restrict access to selected IMAP users

System description Horde Groupware 5.2.3 on Debian Wheezy at home IMAP and SMTP servers at ISP (shared hosting) Horde is up and running and authentication is configured to use IMP. Q1: Being on ...
16
votes
4answers
22k views

How do I verify the speed of my NIC?

I just installed a new gigabit network interface card (NIC) in Linux. How do I tell if it is really set to gigabit speeds? I see ethtool has an option to set the speed, but I can't seem to figure ...
1
vote
0answers
28 views

What kind of situations should I enable IPv6 in my linux server?

As we know, IPv6 module is installed and enabled by default in our CentOS server. But I have never use it and many articles tell us to disabled IPv6 feature for performance or security reason. So what ...
4
votes
1answer
2k views

Linux computer (Debian) in a Windows Active Directory Domain, Administrator of AD should have root permission after login

I managed to join my Debian machine (Squeeze) to an existing Active Directory (MS Windows 2008 R2 Server). Everything works fine, I can login using accounts from the Active Directory (NTP, Kerberos, ...
0
votes
2answers
800 views

Server overloaded with log messages: “tty_release_dev: pts0: read/write wait queue active!”

In the logs, I have this (extract from the full kernel messages logges at 06:01:14): Apr 21 06:01:14 ip-10-49-109-107 kernel: [233185.863038] BUG: unable to handle kernel NULL pointer dereference at ...
1
vote
1answer
161 views

Bootable USB backup

I would like to create a copy of my running Linux installation onto a USB 16 GB pen drive. The current system is a basic ATX PC used as a headless server on a remote location. I would like to have a ...
0
votes
2answers
403 views

Does LVS ldirectord Load Balancer support SSL termination / offloading?

I use a ldirectord setup for load balancing a couple of real servers and for the HTTPS conenctions I am considering using some offloading mechanism on the LB - is there some functionality already ...
1
vote
1answer
808 views

Create a general character devices pair

I'd like to create a character device which has the same properties as a standard pseudo-terminal, but that can be named in a specific name. Basically I'd like to have /dev/pts/my-unique-name instead ...
-2
votes
0answers
10 views

Linux // Plesk - copying FTP backup to local repo via SSH [on hold]

where do I begin, I have a 20gb backup file on my FTP server saved directly from plesk with the automated backup service. I need to copy this to the local repository but plesk is taking forever to do ...
2
votes
1answer
1k views

failed to fetch volume file

When my client try to connect gluster server it gives below error: [glusterfsd-mgmt.c:1627:mgmt_getspec_cbk] 0-mgmt: failed to fetch volume file (key:gluster_vol_0) My client is an Amazon Linux ...
0
votes
1answer
954 views

using tcpdump to display XML API requests without headers or ack packets

I need assistance, I am trying to use tcpdump in order to capture API requests and responses between two servers, so far I have the following command: tcpdump -iany -tpnAXs0 host xxx.xxx.xxx.xxx and ...
1
vote
1answer
841 views

cron daemon forking multiple processes and running jobs multiple times

I'm running a bunch of cron jobs (set up using sudo crontab -e) on Ubuntu, and recently (though I don't know when to be sure) I'm suddenly seeing the same jobs appear to be run multiple times in the ...
-2
votes
1answer
30 views

Point domain to VPS [on hold]

This is driving me crazy, since yesterday night that I am with this.. I read from everywhere but I have no success unfortunately.. I bought a domain on Hostinger and a VPS on ServerArc, what I what ...
9
votes
7answers
13k views

Find out the DNS server for a DHCP connection in Linux

I know they're defined in /etc/resolv.conf, but what if it's not there? And more specifically, how do you find the DNS server returned by DHCP? In GNOME you can use the NetworkManager applet to see ...
-1
votes
1answer
21 views

Pyajam in debian 7 [on hold]

I'm trying to make the installation package python Pyajam I tried to install a pip, I received an error 4Suite-XML package Installing collected packages: pyajam, 4Suite-XML Running setup.py install ...
0
votes
0answers
24 views

How to change mode from manged to monitor on mon0 interface on NIC?

I am connecting to a home router using wifi. The detais of my wireless cards are as follows: #lspci 01:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01) #lspci -vv ...
-1
votes
1answer
17 views

Is it advisable to put a /home in readonly mode when doing server transfer?

I am planning to move a lot Cpanel accounts to another server. Is it advisable to put a /home in read only mode to prevent users from making changes to their account while the migration is on going?
2
votes
3answers
2k views

Nagios NRPE: Command “my_command” not defined

I have installed Nagios® Core™ 3.5.1 and NRPE v2.14 on my client which running RHEL 6.3 I have this error message on my Nagios NRPE: Command 'check_mysql_connections' not defined On my nrpe.cfg I ...
-1
votes
4answers
1k views

Vim how to change the cursor from char block to pre pipe/line

Not sure what the terminology is for it but on Vim the 'cursor' is always like an insert/replace cursor instead of the blinking line cursor I'm used to in other gui editors. Is there any way to change ...
0
votes
0answers
25 views

“NRPE: Unable to read output” while trying to run a script as another user

First of all: I know there were already questions about this issue, but even using their answers I still cannot figure out why my command is not working. What I want to do is call a script on remote ...
-1
votes
1answer
45 views

Give root privileges to an user just for a specific directory

I have have a web server running on my machine and I would like to give the 2 users, misterX and misterY, root privileges for the directory /var/www so that they can also edit the files that are being ...
0
votes
0answers
11 views

Can not view Ubuntu desktop on VNC viewer [migrated]

I'm having problems on trying to connect to Ubuntu 14.04 via VNC from Windows. I'm able to stablish the connection but VNC isn't showing desktop icons. Futhermore, if i move the mouse on the VNC ...
-2
votes
0answers
20 views

Error when I rsync site to vesta before adding it to the CP [on hold]

Well I rsynced all the sites folders from my old host to one running vestacp with the idea to add them and configure in the VestaCP later. Seems that when the directory with the site is already ...
0
votes
0answers
11 views

EFI ignoring isolinux.cfg?

i have a modified centos 6.5 iso with isolinux.cfg which is modified to use kicstart file from iso, it's working on server with BIOS firmware. When tried on EFI systems it shows grub-prompt and ...
2
votes
1answer
2k views

apache sendmail: trying to change user “from” address from apache to domain account

I apologize if I am asking a question already answered, but my problem isn't really that I haven't found an answer. I have, in fact, found a half-dozen different "solutions" to my problem, tried them ...
0
votes
2answers
20 views

shared object file open error with “sudo command” but NOT with “sudo bash” then same command?

I'm having a hard time getting my brain wrapped around how LD_LIBRARY_PATH is handled differently for the following three cases: run as a regular user run via "sudo command" run via "sudo bash" ...
-2
votes
0answers
16 views

How to have WordPress read a text file that has a link as it's only text and use that link in a page? The link changes regularly [on hold]

The subject describes the matter, I think. Using an API, I'm provided a link that changes often, that I need to serve in my WordPress blog. I can easily cron a wget to get me the file. The question is ...
1
vote
2answers
1k views

How to disable hiddev96 in linux (or tell it to ignore a specific device)

I'm having problems with a CentOS 5.0 system when using a certain USB device. The problem is that the device advertises itself as a HID device and linux is happy to try to provide support for it: In ...
0
votes
3answers
2k views

Disable user_deny.db in Cyrus/imapd

We have a cyrus 2.4.12 on Debian, we use packages, rather than building each software ourselves. I am getting the this "log" constantly, a lot of, various users, and 8-10 times per user request: ...
-1
votes
0answers
30 views

Which distribution has the largest security update coverage [on hold]

Most large distributions provide timely security updates to newly discovered vulnerabilities. However, most distributions also limit these security updates to a subset of the packages in the ...
0
votes
0answers
19 views

SFTP, limit download data for specific user

I was wondering if a root user can create another user with a specified limit of data to download from server (i.e.: from Filezilla). Server is Debian 7
90
votes
9answers
28k views

Keeping a linux process running after I logout

I'm connecting to a Linux machine through SSH, and I'm trying to run a heavy bash script that makes filesystem operations. It's expected to keep running for hours, but I cannot leave the SSH session ...
3
votes
3answers
156 views

rsync many small files with long filenames takes a lot of bandwidth

I have a file storage server which stores files on disk using the file's sha256 hash as the filename, along with the file extension, and in three levels of directories, e.g. a PDF file with sha256 ...
6
votes
1answer
965 views

Are ZFS pools or LVM volume groups more reliable for utilizing many partitions?

When deciding whether to use LVM volume groups or ZFS pools in configuring new file servers, what needs to be considered? Is there a "better" choice in the realm of multi-purpose file servers? Unlike ...