# Purpose: Memory monitoring
# Description: Reports free and used physical and swap memory in the system
user@linux:~$ free -h
total used free shared buff/cache available
Mem: 15Gi 6.7Gi 2.1Gi 1.2Gi 6.2Gi 7.1Gi
Swap: 2.0Gi 300Mi 1.7Gi
# Purpose: Process investigation
# Description: Searches for active nginx processes across the system
user@linux:~$ ps aux | grep nginx
root 451 0.0 0.1 14224 2540 ? Ss Feb20 0:00 nginx: master process /usr/sbin/nginx
www-data 452 0.0 0.2 14580 4120 ? S Feb20 0:05 nginx: worker process
# Purpose: Process termination
# Description: Forcibly sends the SIGKILL signal to stop a specific process ID
user@linux:~$ kill -9 1503
user@linux:~$ _