I will teach you linux beginner to advanced

Beginner

• What Linux is, distros, kernels vs user space
• Filesystem hierarchy (/, /home, /etc, /bin, /var)
• Basic commands (ls, cd, cp, mv, rm, man)
• Package management (apt, dnf, pacman basics)
• File permissions (chmod, chown, umask)
• Text editors (nano, vim basics)
• Processes (ps, top, kill)
• Users and groups (useradd, passwd, sudo)

Intermediate

• Shell scripting (bash variables, loops, conditionals)
• Environment variables, PATH
• File redirection and piping (>, <, |, tee)
• Regular expressions and grep, sed, awk
• Job control, background processes
• System services (systemctl)
• Logging (/var/log)
• Networking basics (ping, ss, netstat, curl, scp, ssh)
• Disk management (df, du, mount, lsblk, partitions, fstab)

Advanced

• Kernel modules (lsmod, modprobe)
• Building software from source (./configure && make && make install)
• Advanced bash scripting, cron jobs
• Security: firewall (ufw, iptables), SELinux/AppArmor basics
• Performance tuning (htop, iotop, perf)
• System monitoring (journalctl, monitoring tools)
• Virtualization basics (KVM, containers with Docker/Podman)
• Init systems (SysVinit vs systemd)
• Networking services (DNS, DHCP, web servers)
• Recovery and troubleshooting (grub, chroot, rescue mode)