Log into SSH on your dedicated or cloud server.
# vi named.conf
Make sure following settings exists under Options { … } settings:
Finding Log Files on CentOS
All major system log files are located in the /var/log directory in Centos Linux. Below is a list of the standard log files that are located on a clean Centos install along with a short description.
How to Limit the IP Address that sshd Listens
Log into SSH on your dedicated or cloud server.
You can edit the sshd_config file located in /etc/ssh/.
# vi /etc/ssh/sshd_config
How to Re-install Bootstrap Code (GRUB)
If you have repaired your system from a backup, or have installed another OS that may have overwritten the master boot record (MBR), you will need to repair the bootstrap area.
Re-install bootstrap code (GRUB)
How to Disable IPv6 on CentOS 5.x
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
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.
Install Samba on CentOS6 and Sharing with Windows Systems
Samba and Samba Client
Samba allows both CentOS resources to be shared with Windows systems and Windows resources to be shared with CentOS systems. CentOS accesses Windows resources using a package named samba-client.
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.
How Do I Disable iptables Firewall?
Login as root user on your dedicated or cloud server.
Enter the following three commands to disable firewall.
How to Reset a MySQL root Password
1. # /etc/init.d/mysqld stop
2. Start MySQL server without password:
# mysqld_safe –skip-grant-tables &
