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--- reducing_disk_usage_on_ubuntu [2024/08/14 23:58] – created oso
+++ reducing_disk_usage_on_ubuntu [2024/12/04 04:14] (current) – [Additional Tips] oso
@@ Line 8: / Line 8: @@
   * **Remove Orphaned Packages**: Removes packages that are no longer required.
-    <code>
+<code>
-    sudo apt autoremove
+sudo apt autoremove
-    </code>
+</code>
   * **Remove Unused Dependencies**: Manually inspect and remove unnecessary packages.
-    <code>
+<code>
-    sudo apt-get remove --purge <package-name>
+sudo apt-get remove --purge <package-name>
-    </code>
+</code>
   * **Clean Up Old Kernels**: Remove old kernels to free up space.
-    <code>
+<code>
-    sudo apt-get remove --purge $(dpkg --list | grep -P '^ii\s+linux-image-\d+' | grep -v $(uname -r) | awk '{print $2}')
+sudo apt-get remove --purge $(dpkg --list | grep -P '^ii\s+linux-image-\d+' | grep -v $(uname -r) | awk '{print $2}')
-    </code>
+</code>
 ===== Manage System Logs =====
@@ Line 27: / Line 27: @@
   * **Clear Systemd Journals**: Reduce the size of systemd journal logs.
-    <code>
+<code>
-    sudo journalctl --vacuum-time=2weeks
+sudo journalctl --vacuum-time=2weeks
-    </code>
+</code>
   * **Remove Old Log Files**: Compress and remove older logs in `/var/log/`.
-    <code>
+<code>
-    sudo find /var/log -type f -name "*.log" -exec gzip {} \;
+sudo find /var/log -type f -name "*.log" -exec gzip {} \;
-    sudo find /var/log -type f -name "*.gz" -mtime +30 -exec rm {} \;
+sudo find /var/log -type f -name "*.gz" -mtime +30 -exec rm {} \;
-    </code>
+</code>
 ===== Remove Unnecessary Files =====
   * **Remove Unused Localization Files**: Keep only the locales you need.
-    <code>
+<code>
-    sudo apt-get install localepurge
+sudo apt-get install localepurge
-    sudo localepurge
+sudo localepurge
-    </code>
+</code>
   * **Remove Snap Packages**: Snap packages can take up a lot of space. Remove them if not needed.
-    <code>
+<code>
-    sudo snap remove <package-name>
+sudo snap remove <package-name>
-    sudo apt purge snapd
+sudo apt purge snapd
-    </code>
+</code>
   * **Clear Thumbnail Cache**: Remove the thumbnail cache to free up space.
-    <code>
+<code>
-    rm -rf ~/.cache/thumbnails/*
+rm -rf ~/.cache/thumbnails/*
-    </code>
+</code>
   * **Remove Unnecessary Documentation**: Uninstall documentation files for installed packages.
-    <code>
+<code>
-    sudo apt-get install --reinstall deborphan
+sudo apt-get install --reinstall deborphan
-    sudo deborphan --guess-data | xargs sudo dpkg --purge
+sudo deborphan --guess-data | xargs sudo dpkg --purge
-    </code>
+</code>
   * **Remove Cached Package Files**: Clear out cached `.deb` files.
-    <code>
+<code>
-    sudo apt-get clean
+sudo apt-get clean
-    </code>
+</code>
 ===== Managing Docker Disk Usage =====
@@ Line 72: / Line 72: @@
   * **Prune Docker System**: Remove unused Docker objects.
-    <code>
+<code>
-    docker system prune
+docker system prune
-    </code>
+</code>
   * **Log Rotation for Docker**: Set up a log rotation policy for Docker containers.
-    <code>
+<code>
-    {
+{
-      "log-driver": "json-file",
+  "log-driver": "json-file",
-      "log-opts": {
+  "log-opts": {
-        "max-size": "10m",
+    "max-size": "10m",
-        "max-file": "3"
+    "max-file": "3"
-      }
+  }
-    }
+}
-    </code>
+</code>
 ===== Additional Tips =====
   * **Check for Large Files**: Find large files taking up space.
-    <code>
+<code>
-    sudo du -ah / | sort -rh | head -n 20
+sudo du -ah / | sort -rh | head -n 20
-    </code>
+</code>
-  * **Reduce Image and Video Quality**: Compress images and videos using tools like `ffmpeg` or `imagemagick`.
+**Reduce Image and Video Quality**: Compress images and videos using tools like `ffmpeg` or `imagemagick`.
-  * **Trim the File System**: For SSDs, run the trim command to optimize performance.
+**Trim the File System**: For SSDs, run the trim command to optimize performance.
-    <code>
+<code>
-    sudo fstrim -v /
+sudo fstrim -v /
-    </code>
+</code>
 These methods should help you reclaim significant disk space on your Ubuntu system.
+===== cronjob =====
+This cron job performs routine maintenance tasks to free up disk space and optimize the system on a low-storage VPS. It includes:
+   * Journal cleanup: Removes older system logs using journalctl --vacuum-time=7d.
+   * Docker cleanup: Removes unused Docker objects (containers, images, networks, and volumes) with docker system prune -af --volumes.
+   * APT cleanup: Frees space by removing unnecessary packages and cleaning up cached package files using apt autoremove -y and apt clean.
+   * Kernel cleanup: Removes unused old Linux kernels to free significant space.
+   * Log cleanup: Deletes compressed logs older than 7 days in /var/log.
+   * Temporary files cleanup: Deletes unused temporary files older than 24 hours from /tmp and /var/tmp.
+   * Snap cleanup: Removes old and unused versions of Snap packages.
+This script is executed every Friday at 2:00 PM (server time) to keep the VPS lean and functioning efficiently.
+<code bash>
+14 * * 5 journalctl --vacuum-time=7d && docker system prune -af --volumes && apt autoremove -y && apt clean && dpkg --list | grep linux-image | grep -v $(uname -r) | awk '{print $2}' | xargs apt-get -y purge && find /var/log -type f -name "*.gz" -mtime +7 -delete && find /tmp -type f -atime +1 -delete && find /var/tmp -type f -atime +1 -delete && snap list --all | awk '/disabled/{print $1, $3}' | while read snapname revision; do snap remove "$snapname" --revision="$revision"; done
+</code>