21. Display Mounted Filesystems
Review a list of all mounted filesystems using:
mount
22. Find out Open Files
To determine which files are currently open by processes:
lsof
23. Check User Disk Quotas
Review disk quotas for users with:
quota -v
24. Display Filesystem Inodes
For information about the filesystem inodes:
df -i
25. Review Swap Space
Examine the current swap space settings:
lsps -a
26. List User Last Login
To display the last login time for users:
last
27. Check System Dump Device
Review the configured dump devices:
sysdumpdev -l
28. Display Network Interface Configuration
For details about the network interface configuration:
ifconfig -a
29. Check Active Network Connections
View active network connections using:
netstat -an
30. Find Largest Files and Directories
To determine which files and directories are consuming the most disk space:
du -sm * | sort -nr | head