Linux

• Audio Processing
• Bash Shell
• Disks & Storage
• eMail Servers
• File Format Conversion
• Graphics Processing
• Networking
• Raspberry Pi
• System Setup
• Video Processing

• Unpack an RPM: rpm2cpio myrpmfile.rpm | cpio -idmv
• Finding large files - "du -axS | sort -r -n -k 1,1 | less"
• List files by size - "du -xmS | sort -g"
• Identify processes using files or sockets - "fuser"