Linux Commands Quick Reference

Source

Original document: linux_cmd.md

Core Content

Quick reference manual for common Linux system administration commands and operations.

History Control

unset HISTFILE  # Temporarily disable command history recording

Filesystem Operations

# Create filesystem using debootstrap
sudo debootstrap --arch=arm64 focal ./ubuntu-20.04-arm64 https://ports.ubuntu.com/

# Remote filesystem sync
rsync -avz --numeric-ids --exclude=/proc --exclude=/sys --exclude=/dev root@device:/ ./sysroot

# Clean cache
apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

chroot Operations

# Mount necessary filesystems
sudo mount --bind /dev /mnt/sysroot/dev
sudo mount --bind /proc /mnt/sysroot/proc
sudo mount --bind /sys /mnt/sysroot/sys