Zabbix – “is the ultimate open source availability and performance monitoring solution. Zabbix offers advanced monitoring, alerting, and visualization features today which are missing in other monitoring systems, even some of the best commercial ones.”

Here we have used it for all of my clients’ offices.

Here is one of my storage environment: NAS4Free 9.1.0.1.531 x64 under Proxmox 2.2-31 with paravirtualized drivers used.

Some ftp upload results which are quite satisfactory under the gigabit environment.

Just type in the following command:

[root@mail ~]# for d in `ls /workplace/imap/user/`; do du -s -h /workplace/imap/user/$d; done;

That’s all.

Here is the code for MacTex Chinese Support under Mac OS X 10.6.6, MacTEX-2010:

%!TEX encoding = UTF-8 Unicode
\documentclass[12pt]{article}
\usepackage{CJKutf8}
\begin{document}
\begin{CJK}{UTF8}{bsmi}
This is a test. 中文字測試。
\end{CJK}
\end{document}

Here’s a quick way to downgrade rubygems:

gem uninstall rubygems-update -v 1.5.2
gem install rubygems-update -v 1.4.2
gem -v

Problem:

1. The mysqli error was: Can’t connect to local MySQL server through socket ‘/tmp/mysql.sock’ (2).
2. Click the “Open phpMyAdmin”, it yields the following error: For security reasons, the link to the phpMyAdmin interface from Zend Server is locked for remote access and is only accessible from localhost.

Fix:

1.  sudo ln -s /usr/local/zend/mysql/tmp/mysql.sock /tmp/mysql.sock
2. Change http://localhost:10081/phpmyadmin/index.php -> http://127.0.0.1:10081/phpmyadmin/index.php

Syntax:  dd if=/dev/sda | gzip | ssh root@target ‘gzip -d | dd of=/dev/sda’

Example:
dd if=/dev/xenvg/ss_mail_root bs=32M |gzip |ssh root@192.168.168.4 ‘gzip -d | dd of=/dev/xenvg/yfmail_root bs=32M’
The authenticity of host ‘192.168.168.4 (192.168.168.4)’ can’t be established.
RSA key fingerprint is b0:57:db:cd:c7:d9:7f:5b:ba:df:9d:9a:b7:56:27:ea.
Are you sure you want to continue connecting (yes/no)? yes
root@192.168.168.4’s password:
640+0 records in
640+0 records out
21474836480 bytes (21 GB) copied, 680.57 seconds, 31.6 MB/s
1+551790 records in
1+551790 records out
21474836480 bytes (21 GB) copied, 677.947 seconds, 31.7 MB/s

/* Note with bs size increase, the less time will be taken */
[root@xen02 ~]# dd if=/dev/xenvg/ss_mail_root bs=128M |gzip |ssh root@192.168.168.4 ‘gzip -d | dd of=/dev/xenvg/yfmail_root bs=128M’
root@192.168.168.4’s password:
160+0 records in
160+0 records out
21474836480 bytes (21 GB) copied, 646.192 seconds, 33.2 MB/s
0+464299 records in
0+464299 records out
21474836480 bytes (21 GB) copied, 641.141 seconds, 33.5 MB/s

/* Cloning to other remote machine */
[root@x3 ~]# dd if=/dev/xenvg/win2003 bs=512M |gzip |ssh root@backup.asian-marine.com ‘gzip -d | dd of=/dev/glvg/win2003 bs=512M’
root@backup.asian-marine.com’s password:
20+0 records in
20+0 records out
10737418240 bytes (11 GB) copied, 742.541 seconds, 14.5 MB/s
0+221945 records in
0+221945 records out
10737418240 bytes (11 GB) copied, 741.845 seconds, 14.5 MB/s

First, download the code:

cd /tmp
wget http://www.skype.com/go/getskype-linux-beta-static
mkdir /usr/share/skype
tar jxvf skype_static-2.1.0.81.tar.bz2
cd skype_static-2.1.0.81/
less README

cp skype /usr/bin/skype
cp -r avatars/* /usr/share/skype/
cp -r lang/* /usr/share/skype/
cp -r sounds/* /usr/share/skype/

skype

And your skype should be up and running!

Add these two lines to the httpd.conf and it can hide away the server info for security sake.

ServerTokens Prod
ServerSignature Off

/* Installing NX / FreeNX on the server */

yum install nx freenx

/* Copy a minimal configuration file for nxserver */

cd /etc/nxserver ; cp node.conf.sample node.conf

/* Edit /etc/nxserver/node.conf and change as follows: */

SSHD_PORT=2222   /* Adjust the SSH port if changed */
DISPLAY_BASE=1003 /*  Adjust the display for multiple nx clients */
ENABLE_PASSDB_AUTHENTICATION=”1”

/* Edit the /etc/ssh/sshd_config file and change/add the following lines */

PasswordAuthentication no    /* optional */
AllowUsers nx

/* Optional – Add user to nx database */

nxserver –adduser myuser    /* Note myuser already has a posix account */
nxserver –passwd myuser    /* Change password for myuser */

/* Installing the NoMachine Client */

Follow the nx collection wizard for setting up the client, need to copy the key info (client.id_dsa.key) from server and replace it at the client software under “General – Key Management”.

Ref:

http://wiki.centos.org/HowTos/FreeNX

Enable SSH access