Tag: linux

Your disk is full and du is lying to you. ncdu, df, and find tricks to track down space hogs before your server goes down at 2 AM.

Extract tar.gz, tar.bz2, tar.xz, flags demystified, compression compared, directory extraction, and the gotchas that trip you up.

Use su with a specific shell to switch users without the default login shell, useful when /etc/passwd points to something unexpected.

logrotate keeps your /var/log from eating the disk, configure rotation schedules, compression, and retention for any service log.

Master MySQL from the command line: connect, query databases, manage users, repair tables, optimize, everything you keep Googling, one reference.

Three ways to upload an ISO to Proxmox, web UI, wget direct download, or SCP from the CLI. When each one wins, plus storage paths and checksum verification.

Clean up empty directories with find and rmdir, safely prune orphaned dirs left after file migrations.

Old kernels pile up in /boot and eat disk space, safely remove unused kernels on Ubuntu and Debian with apt and dpkg.

Remove spaces and special characters from filenames using bash loops, rename, find, and parameter expansion tricks.

Service restart not showing logs? systemd hides stdout. Learn journalctl, systemctl status, and debugging workflows for silent systemd failures.

sed is the stream editor for making text substitutions, deletions, and insertions in files, the patterns you'll use 90% of the time.

Switch your default shell to zsh on Linux, why zsh beats bash, installation, Oh My Zsh setup, essential plugins, and the gotcha that still catches everyone.