Log into your dedicated or cloud server via SSH.
##Edit /etc/sysconfig/network and set “NETWORKING_IPV6” to “no”
##For 5.4 and later, replace in /etc/modprobe.conf
alias ipv6 off
Upgrade Dell PowerEdge 2950 Bios on CentOS 5.x
Download “PE2950_BIOS_LX_2.7.0.BIN” from Dell with the service Tag.
1. Upload the file to CentOS box to /home/user.
2. Change the file to executable:
High Memory Usage on a Dedicated or Cloud Server
The common philosophy with respect to system memory is that unused memory is wasted. Most operating systems, including both Windows and Linux maintain what’s called a memory “cache.” Technically this memory space is in use, however it is designed to be freed immediately if applications actually need the memory.
How to Install ChkRootKit on Linux Server
chkrootkit is a collection of tools to detect the presence of rootkits. chkrootkit uses C and shell scripts to perform a detailed process check, and scans systems binaries to detect kit signatures. Upon detection, in most cases, it can remove rootkits too.
Resetting MySQL Admin Password in Plesk – Linux
How Do I Disable iptables Firewall?
Login as root user on your dedicated or cloud server.
Enter the following three commands to disable firewall.
Creating a MySQL Dump File
Run the following command to dump a database:
# mysqldump database_name > Database_name.sql
For example, you want to dump a database called “mydb”.
# mysqldump mydb > mydb.sql
How to Reset a MySQL root Password
1. # /etc/init.d/mysqld stop
2. Start MySQL server without password:
# mysqld_safe –skip-grant-tables &
Check Apache Version on a Dedicated Server
1. Login to your dedicated server as root user.
2. Use the following command:
# /usr/local/apache/bin/httpd -v
Server version: Apache/2.2.16 (Unix)
Server built: Feb 6 2012 11:41:41
Checking Your Dedicated Server for a DDOS Attack
You can use the following commands on a Linux server to determine if your dedicated server is being DDOS attacked.
# netstat -anp |grep ‘tcp\|udp’ | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort –n
This command will show you the list of IP’s which have logged in is maximum number of connections to your server.
