This application offers several easy actions to check and increase hard drive space.
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Folders
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Apt (Installation)
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Old files are ones that can no longer be downloaded
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Logs
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Old logs end in .gz, .old, and .1
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Trash
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Baobab (Disk Usage Analyzer) gives a very nice graphical display of your used space.
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Note that there are other cleanup applications available in the repos such as Bleachbit, but these have a significant potential to destroy an OS and should only be used by advanced users.
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This application offers several easy cleaning actions to help increase and maintain free disk space.
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Main tab
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Select the cleaning actions you want, then click Apply. The selected actions run right away, and if a schedule is chosen they are also repeated automatically.
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Free Disk Space for User – choose the user whose files are cleaned with Select user.
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Clean Folders – cleans the user's Cache and Thumbnails folders, either files not accessed for a chosen time or all of them (potentially dangerous).
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Delete Logs – deletes old (rotated) logs, which end in .gz, .old or a number such as .1, or all logs. Logs older than limits this to logs older than the chosen age.
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Clear APT Cache – deletes old package files, which are ones that can no longer be downloaded from the repositories, or all cached package files.
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Clean Flatpak – removes Flatpak runtimes that are no longer used by any installed application.
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Empty Trash – empties the trash of the selected user or of all users. Trash older than limits this to items older than the chosen age.
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Purge residual configurations from removed packages – deletes configuration files left behind by packages that were removed but not purged.
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Schedule
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The default is No automatic clean. The other choices are At reboot, Daily, Weekly and Monthly. The schedule is saved when you click Apply.
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Tools tab
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Here you will find specialized tools that run once, when you click them.
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Removal Tools
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Remove unused WiFi drivers – removes out-of-tree (DKMS) WiFi driver packages that are installed but not in use, so they are no longer rebuilt every time a new kernel is installed. It covers the Realtek rtl8812au, rtl8814au, rtl8821au, rtl8821cu and rtl8821ce drivers and the Broadcom wl driver (broadcom-sta-dkms).
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List and select kernels to remove – every kernel update leaves the previous kernel installed, so the space they use grows over time. This matters most when /boot is a small separate partition, as it is with root encryption.
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The Kernel currently in use cannot be removed. It is good practice to keep at least one other kernel as a fallback.
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Remove MX manuals for languages other than system default – frees the space used by MX manuals and FAQ files (PDF) in languages you do not need.
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Graphical Tool for Analyzing Disk Usage
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Clicking Run Disk Usage Analyzer starts Baobab, which shows a graphical map of the disk space in use. When it opens it asks you to choose a starting point: a single folder or a whole device.
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It then shows a folder list on the left, sorted by the space each folder uses, and a rings chart on the right. The share of space used is shown as a percentage in the list.
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Clicking a folder moves into it and refreshes the list and the chart. Hovering over a segment of the chart shows the folder or file it stands for and its size.
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Right-click a folder to Open Externally (in the file manager) or Move to Trash.
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A word of caution
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There are other cleanup applications available in the repos, such as BleachBit, but these have a significant potential to damage a Linux system and should only be used by advanced users.
diff --git a/help/remove-kernels.png b/help/remove-kernels.png
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