Directadmin mail forward for 1st (master) account
by Tim on Jan.05, 2012, under Linux, 電腦
In directadmin, mail can be forwarded to other mail box / e-mail address by setting forarder.
However, the setting for master account and virtual account are different. here is the tips.
For master account:
iammaster@domains.com iammaster,somebody@yahoo.com.hk
For virtual account:
iamvirtual@starfls.com somebody@yahoo.com.hk
The different is that for virtual e-mail forwarder, a copy must be sent to the virtual account and forward another copy to the forwarder address. However master e-mail forwarder doesn’t.
Disable dmraid support when installing CentOS 6.x
by Tim on Dec.28, 2011, under 生活
When the Centos installation disk ask for the choice of text mode or graphic mode, use “Tab” to edit and add the following at the end.
nodmraid
Norton DNS
by Tim on Dec.19, 2011, under Networking, 電腦
198.153.192.1
198.153.194.1
Install VMware Tools in Linux
by Tim on Dec.11, 2011, under VMware, 電腦
# yum install gcc gcc-c++ kernel-devel
# ln -s /usr/src/kernels/[your kernel version] /usr/src/linux
# mkdir /mnt/cdrom
# mount /dev/cdrom /mnt/cdrom
# cd /mnt/cdrom
# cp VMwareTools-[version].tar.gz /tmp
# cd /tmp
# umount /mnt/cdrom
# tar zxf VMwareTools-[version].tar.gz
# cd /tmp/vmware-tools-distrib
# ./vmware-install.pl
From: http://www.thewebhostinghero.com/tutorials/install-centos-on-vmware-part3.html
Rootkit Hunter installation
by Tim on Dec.03, 2011, under Linux
Download From
http://sourceforge.net/projects/rkhunter/
Install
tar zxvf rkhunter-*
cd rkhunter-*
./installer.sh --install
cd ..
rm -rf rkhunter*
Run /usr/local/bin/rkhunter --update to update the database
Run /usr/local/bin/rkhunter --propupd to create pre-required MD5 check sum
Run /usr/local/bin/rkhunter -c to run rkhunter
Review log file less /var/log/rkhunter.log
References:
http://sourceforge.net/projects/rkhunter/
http://www.howtoforge.com/faq/1_38_en.html
Enable php feature by .htaccess
by Tim on Mar.24, 2011, under web programming, 電腦
You may use .htaccess to enable php feature by
php_value output_buffering On
However, If the php is not running as Apache modules, 500 errors probably come up.
In this case you should use this instend.
php_flag output_buffering On
Sum the number in each line of a file
by Tim on Jan.31, 2011, under Linux
Here is the command
awk '{s += $1} END {print s}' mydatafile.txt
Red Hat Enterprise Linux 6.0 Benchmarks By Phoronix
by Tim on Jan.30, 2011, under Linux
With Red Hat Enterprise Linux 5.x using the Linux 2.6.18 kernel, EXT3, and GCC 4.1 by default, there’s quite a number of areas in Red Hat Enterprise Linux 6.0 where the performance has improved measurably, assuming you had not manually built newer key packages for RHEL5.
Using GCC 4.4, EXT4, and the Linux 2.6.32 kernel results in noticeable improvements in many areas except for a few where the disk performance falls due to the EXT4 file-system, but that should be because of additional safeguards to protect the drive’s data.
Reference: Phoronix RHEL 6.0 Benchmarks
網路效能測試工具 – iperf
by Tim on Jan.20, 2011, under Linux, Networking
Download and install iperf
Start a server by using command:
iperf -s
Test the bandwidth by using command:
iperf -i 10 -m -t 120 -c IP_ADDRESS
Linux Ethernet Bonding – load balancing / active-passive
by Tim on Jan.15, 2011, under Linux, Networking
This is a notice in the topic of Linux Ethernet Bonding with two ethernet NIC
The case:
There is a server with two ethernet NIC. They are going to be set as either load balancing or active-passive mode.
- For load balancing (round-robin) – mode = 0, this is the default, transmitting packets in order from the first available slave through the last, for load balancing and fault tolerance.
- For active-passive – mode = 1, Only one of the bond slaves is used, and the others act as stand-by mode. Once the active one failure, after particular time period (miimon=xxx), the stand-by one will take over and resume the network connection.
