Firstly, stop and mask the firewalld service: systemctl stop firewalld systemctl mask firewalld Then, install the iptables-services package: yum install iptables-services After that, enable the service at boot-time: systemctl enable iptables Managing the service; systemctl stop|start|restart iptables Saving your firewall… Continue Reading →

Edit the /etc/security/limits.conf file then set the limit for open files from 1024 to 65536. “username” hard nofiles 65536 “username” soft nofiles 65536

Linux swap space is normally configured either on a dedicated partition or a logical volume. Such space is used to extend the amount of effective RAM on a system, as virtual memory for currently running programs. But you can’t just buy extra… Continue Reading →

The following command will list all the files that were modified in the last two days under the current directory. find . -mtime -2 Resources : Linux 101 Hacks

The following command will list all the files that were modified more than 60 days ago under the current directory. find . -mtime +60 Resources : Linux 101 Hacks

In a Linux file system, it is very useful to be able to access a single file from different locations. This discourages you from copying a file to different locations, where subsequently different versions of the file may come to exist. In… Continue Reading →

• Monitoring your Linux system. • Data backup and creating snapshots. • Dumping Oracle or MySQL database for backup. • Creating email based alert system. • Find out what processes are eating up your system resources. • Find out available… Continue Reading →