Linux for Beginners: Disks, File Systems, and APT Packages | Lesson 4 скачать в хорошем качестве

Linux for Beginners: Disks, File Systems, and APT Packages | Lesson 4

▶ Linux for Beginners Playlist:    • Linux. Begginer course.   In this lesson, you will learn how disks, partitions, and file systems work in Ubuntu in a simple and practical way. We will also cover how to check what is taking disk space, why df and du can show different results, and how to install, update, and remove programs with APT. If you want to feel more confident using Linux in real tasks, this lesson is a great next step. 00:00 Intro 00:30 Disk, Partition, and File System 01:24 EXT4 and XFS 03:15 lsblk Explained 03:59 df -h Explained 04:55 du -sh and Folder Sizes 06:07 Why df and du Show Different Numbers 07:27 Deleted File but Space Was Not Freed 10:32 mount and umount 13:10 /etc/fstab Explained 13:06 Inodes and df -i 14:27 Swap Explained 15:21 APT Basics 16:50 apt update 21:16 Snap, Flatpak, and PPA 23:00 Package Managers in Other Distros 23:42 dpkg -L Explained 24:13 Summary Commands used in this lesson Viewing disks, partitions, and mounts lsblk — show disks, partitions, and mount points findmnt — show mounted file systems in a tree view mount | head — show the first lines of currently mounted file systems cat /etc/fstab — show the file system mount configuration used at boot Checking disk space and inode usage df -h — show file system size, used space, free space, and mount points in human-readable format df -h /tmp — show disk usage for the file system that contains /tmp df -i — show inode usage for file systems du -sh ~ — show the total size of the home directory du -h --max-depth=1 ~ — show the size of first-level folders inside the home directory du -h --max-depth=1 ~/.cache — show the size of first-level folders inside the .cache directory Working with large files and open deleted files fallocate -l 200M /tmp/bigfile.log — create a 200 MB file quickly tail -f /tmp/bigfile.log — keep the file open and watch it in real time rm /tmp/bigfile.log — delete the file lsof +L1 — show open files that have fewer than one hard link, often deleted but still open lsof | grep deleted — find open files that were deleted Memory and swap swapon --show — show active swap areas free -h — show RAM and swap usage in human-readable format APT package management sudo apt update — refresh the package list from repositories sudo apt upgrade — install available package updates sudo apt install htop — install the htop package sudo apt remove htop — remove the package but keep some config files sudo apt purge htop — remove the package and its related config files apt search htop — search for a package apt show htop — show detailed information about a package Running an installed program htop — start the htop system monitor Other package systems snap list — show installed Snap packages flatpak list — show installed Flatpak packages Inspecting package contents dpkg -L htop — show which files were installed by the package #Linux #Ubuntu #DevOps