SysDiagMonitor

Here is a sample GNU/Linux bash script that monitors a computer system and user activity regularly and logs key information. The script “SysMonitor.sh” automatically and regularly writes to a log file “SysMonitor.log”.

The log file contains time-stamped detailed information about significant changes to the

following:

• Users currently logged in

• Current processes

• Top 5 CPU utilising processes

• Devices plugged in (e.g. USB)

• Disk usage:

  • Overall disk usage

  • The user’s home directory (/home/someuser…)

• Network interfaces and their states

Highlights

• The script extracts key details about the changes to the computer system such as listed above and adds them to an ever-growing log file.
• I did not have to do any SUDO install as was achived using only common pre-installed command line tools and did not rely on additional programs / tools / libraries /.
• The log file consists of easily readable key details following popular conventional log patterns.