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

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29 views

IO tasks easily starve eachother on 3Ware 9650SE

I have a server (Debian 6 LTS) with a 3Ware 9650 SE RAID controller. There are two arrays, one RAID1, one RAID6. It runs Xen 4.0, with about 18 DomUs. The problem is that I experience that IO tasks ...
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1answer
11 views

Make ProFtpd ignore a blank command

Is there a way to make ProFtpd ignore a blank command? Now it says "500 Invalid command: try being more creative" This confuses a client ftp program. The client (which I can't change) issues blank ...
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1answer
37 views

Linux permissions for multiple groups

I have a directory (With sub directories and files) that I would like to setup so that: -Users of an 'editors' group can rw- any file and rwx any dirs. -Users of www-data can r-- files and r-x dirs. ...
1
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0answers
51 views

Fedora 21 as an AD member suddenly stopped working

I had my Fedora 21 workstation connected to my AD domain and working for about a month and all was well and then I came in one morning and couldn't login. My initial response was blaming Win2013 and ...
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0answers
27 views

I have a dedicated server in Softlayer with 2 sites hosteds [duplicate]

This 2 sites have free online games have games in flash (SWF): www.pinkjogos.net - for girls www.jogaflash.com.br - general In that websites, the games in SWF, the most of them when loading, ...
2
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1answer
22 views

Do cron and atd run jobs with the same user, permissions and environment?

What's the difference between running a bash script via cron and running the script via atd? Is there any difference? Is it specific to the distro? If so, what about SLES 11?
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1answer
23 views

SMP kernel sees only one CPU (i7-930) with ACPI enabled

A Gentoo box running a up-to-date SMP kernel sees only one CPU eventhough ACPI is enabled in AmiBIOS. Any ideas why? > uname -a Linux charlie 3.17.7-gentoo #1 SMP Mon Jan 12 19:31:07 CET 2015 ...
2
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0answers
59 views

kworker consuming +90% IO and zero disk write

this is a standard apache web server on AWS Linux AMI + EBS. We are noticing high load average (+8) and iotop -a shows: Total DISK READ: 0.00 B/s | Total DISK WRITE: 2.37 M/s TID PRIO USER ...
1
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1answer
37 views

Apache2 logs missing in ubuntu 12.04

My Ec2 instance configured with apache2 was running fine and all of a sudden web-server stopped serving pages. I checked all the logs but it didn't help or may i am missing something here. Below are ...
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2answers
47 views

How to remove this iptables rule?

happy new year !!! I have an iptables rule. When searching for it with sudo /sbin/iptables -L -n --line-numbers I am getting it Chain tcp_inbound (1 references) num target prot opt source ...
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0answers
24 views

Suspicious process self with random name in Fedora 20 [duplicate]

When I run top I see a two processes run by root with all random letters(jycybezyxa and jycybezyxa): >Tasks: 246 total, 2 running, 236 sleeping, 0 stopped, 8 zombie >%Cpu(s): 15.3 us, ...
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0answers
50 views

sh script runs manually but partially through cron job

I am new to linux. I am trying to run the below mentioned linux script which in turns calls the main method in my jar MyCode.jar. SCRIPT: #!/bin/sh HOME=/path to/directory CLASSPATH=$HOME ...
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0answers
19 views

Setting up DSLAM with PPPoE server

I have a zyxel dslam and a linux box running PPPoE server connected to a router with an outside connection. What i'd like to do is have a modem connected to the dslam authenticate with the PPPoE and ...
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1answer
26 views

How to specify hard disk for hadoop cluster?

I installed Hadoop on one Azure VM, and it works fine by using its OS disk. However, I attached one hard disk to my VM, and I want to know how to configure Hadoop to only use this new hard disk as its ...
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0answers
14 views

TypeLoadException with ASP.NET on Apache2+Mono

I developed some ASP.NET code on my Mac laptop. It works fine. Deployed it to Ubuntu running apache2+mono. Now, I am getting TypeLoadException claiming that my type cannot be loaded from an assembly: ...
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2answers
26 views

Umount error with device busy, now device name locked from use

I had issues unmounting a device, it kept saying device was busy. lsof and fuser showed no device was attached. I have managed to umount device with the -l option. However, when I plug the hard drive ...
1
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2answers
46 views

Possible to authenticate Samba via Kerberos but without domain-join?

With a Kerberos config file... [realms] DOMAIN.COM = { kdc = dc1.domain.com admin_server = dc1.domain.com } ...it is possible for Linux to talk to Active Directory for password ...
2
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0answers
52 views

Where is my RAM going? [duplicate]

I see only 370 MB (10%) free on an AWS Amazon Linux instance: $ free -m total used free shared buffers cached Mem: 3752 3709 42 0 ...
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2answers
37 views

Is it possible to use Gmail for transaction email?

We currently use Gmail for our support email. For transactional email (reset password, etc) we just use default Linux Postfix server on our Amazon Web Serivce EC2 instance. My question is would it ...
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0answers
23 views

Extending partition on Google Compute Engine Centos 6 with Cpanel

Before I created a VM on Compute Engine, I first created a disk with 100gigs on Centos6 image. I then created a VM using the 100gig Centos disk. When that finished I installed Cpanel on it and I ...
0
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1answer
25 views

Exim4 on DebianWheezy: Rejected by RCPT Unrouteable address

Recently I updated the MX records on a domain1.com to point to domain2.com. Domain two is currently running exim4 and I would like it to relay mail for domain1. The problem is every time I send an ...
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2answers
26 views

How to properly organize running multiple processes of a project

I have a project for which I need to start multiple services such as webserver, websocket server, different processors of raw info into more complex etc. Before I was doing this manually, in linux ...
2
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1answer
36 views

Monitoring HP Smartarray (cciss) with nagios

I'm trying to monitor an HP Smart Array controller using nagios. I have 4 disks on 2 RAID1 arrays, so 2 disks per RAID1. I installed nrpe-server and nrpe-plugins and I'm using the almighty check_raid ...
2
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1answer
41 views

How to exit after starting a service in Linux for loop

I have a for loop I'm using to stop and start number of development servers here is an example. for i in `cat hosts` ; do ssh $i -i .ssh/key.key -t sudo /etc/init.d/jboss-as start ; done This will ...
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0answers
26 views

postfix multi instance saslauthd error

I have CentOS6 and want to create postfix multi instance but getting SASL auth error: I am having same issue here, I have created /etc/sasl2-second/ directory and following are the options in ...
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0answers
5 views

Does the guest OS need updates/changes after changing the number of cores in VMware Player? [migrated]

I installed ubuntu on a vm in VMware Player and forgot to change the number of cores from 1 to 8. If I change that now will the linux kernel need to be recompiled or anything like that or will it just ...
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0answers
12 views

Copy a Windows VPN client configuration to a Linux client so it also connects to a Windows VPN Server [migrated]

I have two virtual machines at hand, one Windows 8.1 and the other Debian 7.7 linux. The first one (Win8.1) was already configured to connect to a Windows PPTP VPN, I now need to do the same on the ...
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0answers
10 views

mod_proxy_html rewriting html tag

I am having an issue with mod_proxy_html for apache and a page not displaying correctly. The setup is a Scientific Linux 6.5 x86_64 server running httpd 2.2.15 and proxying to a back-end web server ...
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0answers
70 views

AttributeError: 'module' object has no attribute * python

I am struggling with compiling python 2.7.9 from source and have been advised to ask this question here. While installing python 2.7.9 following the steps described here the following errors ...
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0answers
11 views

connection speed and quality of service of hyper-v virtual machines [migrated]

I have a Win64-8.1 machine hosting several ArchLinux guests. Both host and guests connect through the same Ethernet adapter via a Virtual Switch. The connection to the provider, measured by ...
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0answers
11 views

Remmina TLS, NLA works, but high encryption fails

Remmina works fine with TLS and NLA. But if encryption is set to high instead of client compatible, then it stops working. Questions: 1. Why setting high encryption prevents connectivity? 2. What's ...
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0answers
12 views

How do I recompile Python in VirtualEnv? [migrated]

I built virtualenv and it adds Python 2.7 by default in it. After reading this solution to a bug I have, it says I have to recompile Python with the option --enable-shared. So should I rm -rf Python ...
2
votes
1answer
48 views

Semi-regular network failure (Dropped RX Packets)

Networking is not my specialty, and I have done my best to try and isolate this problem, I would like some pointers as to how to further narrow down what the issue may be. Server: File Sever running ...
1
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1answer
32 views

Installing mod_wsgi error - config.status: error: cannot find input file: Makefile.in [closed]

Below, I'm trying to install mod_wsgi. [root@server]# ./configure --with-python=/usr/local/bin/python2.7 checking for apxs2... no checking for apxs... no checking Apache version... ./configure: line ...
1
vote
1answer
31 views

Local “incoming” dir

I need to create a directory on a Linux server where users can "submit" files, similar to the incoming directory on an ftp server. (Where they would not be viewable after submission.) Specifically, ...
1
vote
1answer
16 views

What does the tcp_fastretrans_alert error mean?

I found this error a couple of times in /var/log/messages after experiencing some odd TCP behavior: For some reason, if I connect to for example SSH for the first time in say an hour, the connection ...
-1
votes
1answer
32 views

How to forward catch-all emails to another domain/email with postfix? [closed]

I am totally newbie with email postfix (any email server) but I would like to do this: Example: - all incoming emails for @domena1.sk forward to ciel@domena2.sk - all incoming emails for @domena3.sk ...
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0answers
37 views

Setting the MemoryLimit of a user-created systemd scope using cgroups as user

Related: LImiting overall memory usage for child processes Is there a way for an unprivileged user, or for root to allow an unprivileged user, to create a systemd scope (or other control group ...
0
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1answer
36 views

Linux firewall, ADSL bonding, two default routes

I am trying to set up a Linux firewall (ubuntu 14.04) to use two bonded ADSL lines for load balancing purposes. I found by searching the forum link to this: ...
0
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2answers
36 views

is there a way from iptables/iproute to forward all traffic to my IDS and also keep the regular flow

The reason of this, is that to catch all packages into my IDS keeping my existing enviroment, so the IDS does not become a single point of failure. If route all my traffic into my IDS and from my IDS ...
4
votes
2answers
699 views

Which CentOS Version Should I Use?

I have some used rackmount servers (Dell R610, HP DL180 G6, HP DL360 G5) that I intend to use for on demand video streaming in a colocation environment. I would like to have them all on the same OS to ...
0
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0answers
45 views

Linux Redhat inbound NIC routing

I am running a SIP application on a Redhat Linux server with 4 nics on separate LANs. SIP runs on UDP port 5060. When I send a inbound packet to port 5060 NIC0, the packet gets delivered to the ...
0
votes
2answers
60 views

PHP file Upload & execution Prevention

I am security administrator for a shared Linux web hosting. I have done my level best to secure the server in many ways within the possible limitation. Means, As it is shared hosting, there will be ...
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0answers
15 views

Problems with automatic generation of an apparmor profile

Could anyone please provide me any assistance with an automatic apparmor profile generation? The problem is that it is simply does not work for some reason. I have a binary file, symlink to it and a ...
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0answers
33 views

schedule command with “at” after reboot

I'm trying to schedule a command to run only once with at. But the server is prone to reboot at least once every day. I already tried to schedule a command with at` to be executed in 24 hours, but it ...
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0answers
28 views

HAProxy Monitoring Detail Stats

I am using HAProxy, load balancer[with 2 Servers] with following configuration : global maxconn 4096 user haproxy group haproxy daemon stats socket ...
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0answers
23 views

Return traffic through same interface as entered

I've created a GRE tunnel on my Linux server (VPS, OpenVZ). Server gets a public IP address from this tunnel and I need it be accessible from Internet through it. There is already a default gateway, ...
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0answers
24 views

given some file names, print the total disk usage of these files

Given a potentially very large list of file names whose files are located in different directories, different naming conventions, etc, how to compute and print the aggregate disk usage for the files? ...
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0answers
20 views

Why http.conf Variations [migrated]

What is it that determines the contents of a httpd.conf file in a fresh Apache install? I ask because a few months ago I installed one server and the httpd.conf file was as long as a book, however ...
0
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1answer
26 views

Finding BIND Queries Per Month

I need to find out the number of queries that my BIND server is handling a month. I have dumped the stats out to named.stats, but I am having problems understanding it. How can I find out what time ...