Tag: cli

Find your Linux distro version, kernel version, and architecture with uname, lsb_release, /etc/os-release, and hostnamectl.

Bulk rename files from bash: strip spaces and special characters with loops, parameter expansion, rename, and perl patterns. Test before you touch anything.

Fix 'Argument list too long' in bash when cp or rsync chokes on thousands of files, glob loops, find + xargs, and the ARG_MAX reason behind it.

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.

Repair and optimize all MySQL databases at once with mysqlcheck, a one-liner that runs on every table without logging into MySQL.

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

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

Rename files to remove spaces and special characters using bash, rename, tr, and parameter expansion patterns for bulk file cleanup.

Empty directories pile up after file migrations. Prune them with find and rmdir, dry-run first, use find -delete, and handle hidden dirs without surprises.

Count files in a directory (recursively or not) with find, ls, and tree, quick one-liners for when du just isn't telling you enough.

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