Learn how to install, configure, and use the AWS CLI on Linux, macOS, and Windows. Covers named profiles, essential S3/EC2/Lambda commands, JMESPath filtering, and IAM role authentication.
Read More →The Linux file system follows a unified hierarchical tree starting at root (/). Learn about key directories, paths, and permissions every sysadmin must know.
Read More →A curated reference of essential Linux commands for file management, text processing, system monitoring, and user administration — every sysadmin needs these.
Read More →Learn how to install, configure, and harden SSH on Linux. Set up key-based authentication, disable root login, and secure your server against brute-force attacks.
Read More →NFS and Samba setup guide for Linux: configure file sharing between Linux servers and Windows clients with real examples, fstab mounts, and firewall rules.
Read More →Linux performance monitoring guide: top, htop, vmstat, iostat, free, and sar explained. Learn to identify CPU, memory, and I/O bottlenecks on Linux servers.
Read More →Linux text processing with grep, awk, and sed: search, filter, transform, and extract data from logs and files. A practical guide for sysadmins with real examples.
Read More →Linux environment variables explained: export, PATH, .bashrc, .profile, /etc/environment, and systemd EnvironmentFile. Learn to configure the shell environment.
Read More →Linux log management explained: journalctl, /var/log files, logrotate, and journal size management. Learn to find, filter, and manage logs on Linux servers.
Read More →Linux firewall guide: ufw for Ubuntu, firewalld for RHEL/Rocky, and iptables fundamentals. Set up server firewall rules with real commands and examples.
Read More →