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

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3
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1answer
486 views

Stop cron from sending mail to root for a specific process

I have a little problem with the cron daemon. I want to stop it from sending mail for a specific command. For example if I have: 10 * * * * someScript1.sh 15 * * * * someScript2.sh I want to get ...
4
votes
1answer
1k views

Linux IPv6 Transparent Proxy (but Linux doesn't support NAT on IPv6!?)

On Linux I can make a transparent proxy simply by adding a iptables -j REDIRECT command. To my surprise, I am needing to support IPv6. Simple enough right? iptables6 -j REDIRECT command not ...
0
votes
1answer
552 views

Linux server with JBoss , the system cache increased each day

We run an Apache Mod_proxy cluster with 3 JBoss in three dedicated server. Because we need share many files (small object files which our apps need to read/write ) between these JBoss servers ,we ...
2
votes
2answers
448 views

Monitor a custom Java HTTP server from a bash shell?

How could I monitor a service port from a bash shell? I want to monitor a Java service (once per minute on port 9090) and then call "/etc/init.d/myservice -restart" if the service isn't responding ...
0
votes
1answer
148 views

Regarding complete backup and restore of Linux system

This is regarding following: Complete restore of linux system The selected answer has one line: use rsync the entire thing with something like: "rsync -axvPH --numeric-ids ..." Can I have the ...
1
vote
2answers
290 views

Share Data Using HTTP / FTP?

I have a network of 20 machines, running Ubuntu 10.04. Each machine has about 200[GB] of data that I'd like to share with all other 19 machines for READ ONLY PURPOSES. The reading should be done at ...
1
vote
3answers
196 views

Data Storage & Design Using Multiple Machines?

I need to build a system to store & maintain a huge amount (20 [TB]) of time-series data (for many different instruments), so that it would support the following requirements: (1) fast appends of ...
2
votes
5answers
315 views

Linux Traffic Logging

I'm looking for a good free method of logging IP heading information (src/dest IP with timestamp) passing through a Linux router. I know I can do this with tcpdump -i eth0 > log.txt However I'm ...
1
vote
1answer
3k views

ive got dkim=neutral (bad version) header.i with gmail and dkim=fail (unknown key type) with yahoo

I'm having external ip and ubuntu server with exim4.71 and bind9. I'm trying to set valid dkim entry to send mail for gmail Here are my configuration files: bind9: _domainkey.example.com. IN ...
0
votes
2answers
243 views

Doubts on /etc/fstab vs /dev content (under Ubuntu 10.10)

I've a question: When I open /etc/fstab file, I see the following content: proc /proc proc nodev,noexec,nosuid 0 0 /dev/sdb1 / ext4 errors=remount-ro ...
0
votes
1answer
4k views

Ubuntu 10.10 Live CD - How to copy files to external USB drive (no permissions?)

I booted up an Ubuntu 10.10 live CD and plugged in an external USB hard drive. It brings up the drive contents and shows all the files, but it won't let me copy files to the external USB drive. It ...
1
vote
1answer
1k views

Your IP is blacklisted - Directadmin

While logging in to the directadmin control panel, it says that my IP is black listed. "Your IP is blacklisted" I already checked in CSF but my IP is not black listed. Is this any error related to ...
6
votes
3answers
10k views

run rsync as root but keep user ownership

I would like to backup user files from one server to another with rsync. but I noticed that the user folders change to root. how can I keep the user permissions with rsync (running by root)?
1
vote
3answers
366 views

Send mail error Ubuntu VPS

I am experiencing an error when trying to send mail to certain hosts from my VPS. Here is an example: SMTP error from remote mail server after MAIL FROM:<someone@mysite.com.com> SIZE=1409: host ...
0
votes
4answers
7k views

Install GD Library for PHP in GoDaddy VPS with CentOS???

When I tried to install php-gd library in my GoDaddy VPS with CentOS, It gives: $ yum install php-gd Loaded plugins: fastestmirror Determining fastest mirrors addons                                   ...
0
votes
2answers
295 views

Ubuntu incoming mail server

I am trying to set up and configure a mail server in which I can receive email however I am not having any luck with Postfix or Exim4. I currently have Exim4 configured and it sends mail fine, however ...
2
votes
2answers
991 views

Backup of machines running linux and windows

I have a problem concerning backup. I have a network (constructed using Wireless 150Mbps and Gigabit ethernet) consisting in at least 3 computers (plus maybe 2 in remote). I have a plan to construct ...
3
votes
2answers
473 views

is it wise to switch from VPS to EC2?

My web needs are simple. I use debian os, apache, mono+xsp+mod_mono for aspx hosting, mysql, nagios, some bash scripts for backup purposes and occasionally random libs like encryptfs which i may not ...
2
votes
2answers
358 views

comparing disk performance of machines

I am in the process of moving applications running on old Linux machines onto VMs. As part of this, I need to justify the VMs have at least the capacity (i.e. CPU speed, RAM, disk, disk speed, network ...
0
votes
1answer
256 views

Apc don't cache file type, it only cache user type

Apc don't cache file type, it only cache user type.I tested with localhost, APC cached all file i use on localhost. but it doesn't work on my shared hosting. is it because configure ? This stats in ...
2
votes
1answer
391 views

linux permissions problem rails FileUtils.copy

I have centos CENTOS 5.5 x86_64. apache 2.2 nginx/0.8.54 rails 3 ruby 1.8 passenger Its cpanel. What I am trying to accomplish is to upload an image to /tmp and then move it to the doc root of the ...
2
votes
2answers
3k views

Specifying a preferred route when there are multiple links to same network

I have a server with multiple interfaces and IP addresses on the same network. I would like for non-iSCSI traffic to exclusively use one of the interfaces, and for iSCSI traffic to exclusively use the ...
1
vote
1answer
93 views

can gnu tar detect changed directory ownership?

I'm using tar 1.15.1 (CentOS 5.5) to archive a directory. [www]$ tar -tvzf public_org.tgz 'public/files' drwxrwxr-x root/www 0 2010-12-01 07:33:33 public/files/ -rwxrwxr-x root/www ...
0
votes
1answer
939 views

SVN works with file:/// , can't access via svn:// svnserve is running

on Ubuntu, I have SVN setup. I have created a repository and imported the files. On the same machine, I can checkout via file:// Works: svn checkout file:///svn/siteinabox Doesn;t work (tried ...
0
votes
1answer
138 views

IRC Bots Behind HTTP Proxies

I'm trying to run an IRC bot in a Debian based server. Its behind a HTTP proxy, so, I need to 'export http_proxy' for normal usage. The problem I'm facing with the bot is that, as far as I know it ...
0
votes
3answers
4k views

Unable to get the SSH access for a new user

I created a new user on ubuntu 10 username: codeuser There is an existing user called "admin". Now, my problem is that I cannot directly connect to the server using the codeuser credentials. But, I ...
0
votes
1answer
398 views

How do I interpret ByteMARK / nbench results?

As part of a server burn-in process, I am running nbench (BYTEmark). The results show two FLOATING-POINT Indexes and two INTEGER Indexes in the results, one under "Original Bytemark" and the other ...
2
votes
0answers
315 views

Postgres shell logout weirdness on debian

So, strangest thing happening on Debian PostgreSQL user: lab3:~# su - postgres postgres@lab3:~$ plogout lab3:~# And: lab3:~# su postgres postgres@lab3:/root$ pexit lab3:~# What is happening ...
1
vote
4answers
166 views

share 500 GB of read only data with hundreds of computers on a network?

I have a bunch of different binary files (total size of all files is circa ~500GB) stored in a hard drive that is mounted to machine001. I have 200 other machines that need to access this data for ...
0
votes
1answer
197 views

apache warnings

While I restart httpd service I see a thousand of warnings like the following: Warning: DocumentRoot [/home/u79894/domains/edsdsdics.com.mx/private_html/lms] does not exist Warning: DocumentRoot ...
1
vote
1answer
461 views

LVM over Raid 1 with different size disks in Ubuntu

I'm currently building a backup server for a few of the machines in the office. I plan to run ubuntu 10.04 LTS on it. My current setup is: 2 x 1TB disks in software RAID 1 configuration 2 x 2TB ...
0
votes
5answers
1k views

How to instantly show the uptime for a group of servers in my intranet on Linux?

I am not looking for sniffering tools, but quickly show the uptime for some servers.
5
votes
7answers
2k views

running tar completely locks up mysql

I am having a seriously weird issue. If I tar some random directory with many files or a single large file tar -pcvf files.tar /var/log, mysql gets completely locked up and all mysql connections get ...
1
vote
3answers
3k views

Traffic shaping on Linux with HTB: weird results

I'm trying to have some simple bandwidth throttling set up on a Linux server and I'm running into what seems to be very weird stuff despite a seemingly trivial config. I want to shape traffic coming ...
-1
votes
1answer
193 views

PAM: which type of pam sets uid/gid?

Which type of pam modules (session, auth, account) sets uid/gid? Thank you.
1
vote
1answer
194 views

ReiserFS warning: reiserfs_get_unused_objectid: no more object ids

I've a partition in ReiserFS which stores images from a camera (so it keeps adding/removing directories with pictures...). When doing a dmesg, I get the following "warnings": [227297.192297] ...
0
votes
3answers
1k views

apply back firewall after iptables flush

yesterday i got my self locked from my own server. and than i try to flush iptables from another server to get it unlocked as this question response 3 times fail then lock After that, i cannot login ...
2
votes
1answer
676 views

jailkit chroot terminates ssh login

I've done my very best to follow these instructions to create a chroot shell. But the connection get's terminated every time I try to login via ssh for my new chrooted user. I start my ssh terminal, ...
1
vote
1answer
372 views

Recommend tools for auditing/testing MIT Kerberos Passwords

Debian 6 MIT Kerberos i.e. krb5 I want to be able to audit/test the passwords in our Kerberos server periodically for quality. If the passwords can be cracked quickly I want to notify the users to ...
1
vote
1answer
111 views

Upload speed spikes: tries to increate to 100% and then falls back again

I'm uploading a large file. The problem is: uploading speed jumps to 134 KiB/s (≈100% of my bandwidth) and then immediately back to 67 Kib/s (≈50% of my bW): every 3 seconds it tries to increase ...
5
votes
3answers
2k views

List supported terminal types?

Is there a portable way to list supported terminal types on all *N*X systems? If not, what's the best way to get this list on Solaris?
0
votes
3answers
335 views

Cronjob to Backup Database every day at 10pm

I managed to setup a cronjob: * 13 * * * date=`date +\%d-\%m-\%Y-\%s`; mysqldump -u root -pPassword1 db121 > /home/backup/xbackup_$date.sql; gzip /home/backup/xbackup_$date.sql I am hoping the ...
3
votes
2answers
737 views

Cannot run a VM with more than three network interfaces with KVM

I'm running KVM on top of Ubuntu 10.10 Server I can create VM's (Virtual Machine) and network interfaces fine but I cannot seem to add more than three network interfaces. As soon as I have a VM with ...
3
votes
2answers
3k views

ethernet smp_affinity vs /proc/interrupts vs /sys/class/net/ethX/device

My goal is to configure our CentOS ("free" RHEL) 5.x servers for custom low-latency network programs. I would like to experiment with binding ethernet NIC interrupt handling to the same CPU on which ...
0
votes
1answer
143 views

CentOS 5.5 - passing parameters from grub to the user space

I need to add an additional title to my grub.conf file and after OS boot I need start different services depends on it What the better way to do that?
0
votes
1answer
20 views

killing queued commands before they start

I've queued a backgrounded command via command 1 && command 2 & command 1 is currently running, however I need to make sure command 2 is never executed. If I need to kill command 1 in ...
0
votes
1answer
1k views

iptables to allow 80 and 443 on chillispot running ddwrt

I am having problems setting this up. this is what I am trying to do. I have Chillispot (hotpsot) running on dd-wrt. Everything is setup, but the client wants only 80 and 443 to go through through the ...
2
votes
1answer
1k views

Trouble running Python Celery as a daemon

I have Celery setup and running as a daemon on a Ubuntu EC2 instance. This morning I updated some of the tasks and tried to restart Celery and it wasn't working. After working at it a bit I found: ...
1
vote
5answers
5k views

wget blocked by iptables in CentOS 5.5 and iptables 1.3.5

Whith this rules I can't use wget to an external address or send emails through an external SMTP server: #!/bin/bash # Flush all current rules from iptables iptables -F # Allow SSH iptables -A ...
3
votes
3answers
356 views

Which *light* ubuntu to use as a git central server? [closed]

At my company we're currently using a self-deployed copy of the http://gitorious.org code to manage our repositories.. It's an absolute monster!! Gitorious is a very heavy ruby on rails app and the ...