The Basic TcpDump is a command line network monitoring tool for viewing packets, in real time, as they pass through the server network interface. Specifically, it can be used to view and record packets going into and out of a network interface and can be used to conduct all sort of analysis. I use this…

Introduction VIM is a popular Linux text editor program. Users can customize VIM by creating a .vimrc file in their home directory. Then, when launching VIM, it will load any variables that were preset in this file. You’ll need to set the file permissions of the .vimrc file to rw-rw—-. A sample .vimrc file In…

Introduction Often it is necessary to get the OS version, hardware statistics, running process, and details about the file system. You may need to monitor CPU percent level or check the remaining space on a hard drive. In any case, you can use the below commands. What is OS Linux version Get the installed memory…

Introduction Crontab stand for CRON table and it is the primary task scheduler for Linux. The CRON daemon runs every minute and checks each user’s crontab (and the system crontab) for scheduled jobs. CRON will auto start on reboot and record to syslog natively when a job runs. CRON will send “standard out” and “errors”…