Tag: sysadmin

Generate SSH keys, set up passwordless auth, configure SSH, and transfer files securely with SCP, the foundation of headless Linux work.

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.

tar, gzip, bzip2, xz, zip, demystified. When to use each compression tool, speed vs ratio trade-offs, and the flags you'll actually need.