Linux

Linux

Technical knowledge, commands, configuration notes and troubleshooting guidance for Linux.

Misc

• MS-DOS to Linux commands
• Enhancing the vi (or vim)
• Linux performance monitoring
• Tuning network performance adjusting kernel parameters
• Puppet Manifest Samples
• How to use telnet without the telnet command installed
• Adding and extending disks/volumes in LVM
• Management cards (iLO/DRAC) and Hardware sensors (fan/temperature)
• Linux firewall examples with nftables and iptables
• SSH Tunnel (Port forwarding)
• AD integration - ssh/sudoers using AD accounts

Bash

• Bash loops
• List files sorting by size
• Delete files older than x days
• Sorting/filtering/counting text data
• Measuring log growth rate (lines per second)
• Remove DOS line endings from Text files (CR/LF)

OpenSSL and SSH

• Generate private keys and CSRs with OpenSSL
• Convert certificate formats with OpenSSL
• Configure OpenSSH public key authentication

Docker

• Docker installation
• Docker commands
• Manual container creation

More articles

• Retrieve iLO IP Address

Official and external resources

• OpenSSH
• nftables wiki
• OpenSSL documentation
• Crontab schedule editor