Insufficient disk space linux

Insufficient disk space linux

Type in the terminal: cd /ho and press the tab key, an error is displayed:

This is because the space of the disk is full, and you can expand the capacity at this time, or migrate some directories of the disk to other disks. Since the Alibaba Cloud server purchased has no extra disks to expand, only the files that take up a lot of space and are not commonly used can be deleted.

The following is the solution, find the largest file, and then kill it:
1. Use the df -h command to view the hard disk space

2. Use du -sh /* command to view which directory is the largest, and find large files step by step

3. Use du -h —max-depth=1 command to find the largest file

This command can list the size of the folder. And ls -lh can only list the size of the folder itself

In this way, larger files can be found and deleted.

After deleting a large file, the disk usage is no longer 100%, but the following error will still occur when using tab key completion.

After going through Google, it is found that the /tmp directory is full, and the folders in this file cannot be deleted casually ( ）。

After general query, you can solve the problem of insufficient /tmp space by creating a new temporary folder. The following is the entire code to solve the problem of insufficient /tmp space

Add the following statement in the /etc/profile file

Then make the /etc/profile file effective

So far, the problem of using the tab key due to insufficient /tmp space has been solved.

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7 Simple Ways to Free Up Space on Ubuntu and Linux Mint

Last updated January 26, 2021 By Abhishek Prakash 168 Comments

Brief: Running out of space on your Linux system? Here are several ways you can clean up your system to free up space on Ubuntu and other Ubuntu based Linux distributions.

Over time, any operating system can become cluttered as programs are added and removed. If you have like a TB of storage capacity, you might not bother to clean up Ubuntu to make some disk space. But if your hard disk has limited space, like I have a 128 GB SSD laptop, freeing up disk space becomes a necessity.

In this article, I’ll show you some of the easiest tricks to clean up your Ubuntu system and get more space. I’ll also share some advanced tricks so that you’ll have choice.

But before that, let’s see how to find the free space remaining on Ubuntu.

Check free space on Ubuntu

It’s always a good idea to check the free disk space in Linux first. This is rather easy on Ubuntu. Just use Disk Usage Analyzer tool. Search it in the menu and run the tool. You should see the disk space used and the free space remaining in here:

Once you know the state of free space on your disk, it’s time to clean up your system and make some more free space here.

How to free up disk space in Ubuntu and Linux Mint

There are several ways you clean up disk space in Ubuntu and other Ubuntu based system. I have discussed several command line tricks here followed by some GUI options.

While I have mentioned several ways here, if you are a beginner, avoid the ones marked as ‘expert’. Not that you cannot use them, but it’s better to avoid if you don’t know what you are doing.

I am using Ubuntu 16.04 while writing this tutorial but you can use the same steps for Ubuntu 18.04 and other Ubuntu versions, Linux Mint, elementary OS and other Ubuntu-based Linux distributions.

If you prefer videos, I have made a video to show you how to clean Ubuntu.

1. Get rid of packages that are no longer required [Recommended]

If you read the apt-get commands guide, you might have come across the apt-get command option ‘autoremove’.

This option removes libs and packages that were installed automatically to satisfy the dependencies of an installed package. If that package is removed, these automatically installed packages are useless in the system.

It also removes old Linux kernels that were installed from automatically in the system upgrade.

It’s a no-brainer command that you can run from time to time to make some free space on your Ubuntu system:

As you can see, this command is going to free up 300 Mb of free space in my system.

2. Uninstall unnecessary applications [Recommended]

We all have a few games and/or applications that we hardly use. Don’t trust me? Go and find all the installed software on your Ubuntu system.

Chances are that you have a number of apps installed that you seldom use. Maybe you installed them on the back of an awesome review, out of nosiness, or to handle a particular task.

If you need space more getting rid of the unused or lesser used applications is always a good idea.

You can remove a program in Ubuntu from the software centre or using the command below with particular app name:

3. Clean up APT cache in Ubuntu

Ubuntu uses APT (Advanced Package Tool) for installing, removing and managing software on the system, and in doing so it keeps a cache of previously downloaded and installed packages even after they’ve been uninstalled.

The APT package management system keeps a cache of DEB packages in /var/cache/apt/archives. Over time, this cache can grow quite large and hold a lot of packages you don’t need.

You can see the size of this cache with the du command below:

As you can see, I have over 500 Mb of cache storage. When you are almost out of space, this 500 Mb can make a lot of difference.

Either remove only the outdated packages, like those superseded by a recent update, making them completely unnecessary.

Or delete apt cache in its entirety (frees more disk space):

4. Clear systemd journal logs [Intermediate knowledge]

Every Linux distribution has a logging mechanism that help you investigate what’s going on your system. You’ll have kernel logging data, system log messages, standard output and errors for various services in Ubuntu.

The problem is that over the time, these logs take a considerable amount of disk space. You can check the log size with this command:

Now, there are ways to clean systemd journal logs. The easiest for you is to clear the logs that are older than a certain days.

Here’s an example:

5. Remove older versions of Snap applications [Intermediate knowledge]

You probably already know that Snap packages are bigger in size. On top of that, Snap stores at least two older versions of the application (in case, you want to go back to the older version). This eats up huge chunk of space. In my case, it was over 5 GB.

Alan Pope, part of Snapcraft team at Canonical, has created a small script that you can use and run to clean all the older versions of your snap apps.

What you have to do here is to create a new shell script and use the following lines in your script:

Give it execute permission, run the shell script with sudo and see the magic. The script removed the older Snap packages and freed over half of the 5 GB space used by Snap.

6. Clean the thumbnail cache [Intermediate knowledge]

Ubuntu automatically creates a thumbnail, for viewing in the file manager. It stores those thumbnails in a hidden directory in your user account at the location

Over time, the number of thumbnails would increase dramatically. Moreover, the thumbnail cache will eventually contain many superfluous thumbnails of pictures that don’t exist anymore.

You can check the size of thumbnail cache with the command below:

For my system, the thumbnail cache is over 300 Mb in size.

So it’s a good practice to clear the thumbnail cache every few months or so. The quickest way is to use the terminal (please copy paste the commands to avoid mistakes):

7. Find and remove duplicate files

Sometimes you may have duplicate files in different places in your system. Getting rid of the duplicates will certainly free up some space and clean your Ubuntu system.

You can use a GUI tool like FSlint or a command line tool like FDUPES for this task. I recommend reading this article to see how to use these tools to remove duplicate files.

4. Remove old Linux kernels that were manually installed [For Experts]

The command discussed in the point 1 removes old Linux kernel. But it won’t work if you manually installed the kernel in Ubuntu. But removing old, unused Linux kernels will still save you plenty of space.

So, if you manually installed a Linux kernel, perhaps you can manually uninstall it as well.

List all installed Linux kernels first:

Removing the old kernels is the same as removing any other package. I’m using shell expansion for the version numbers to save typing. It will prompt you with a list of packages that will be removed, so you can double check the list before continuing.

Note: Replace VERSION with the version of the kernel you want to remove.

My recommendation is to keep at least two or preferably three kernels including the latest. This way, you will have at least one/two other kernels to boot with, if for whatever reason the latest kernel you are unable to boot with.

5. Remove orphaned packages [For Experts]

This step is best avoided if you are a beginner. I am not a fan of this method and I advise you to avoid it.

First, let’s see what is an orphaned package in Ubuntu.

Suppose you installed a package ‘myprogram’. But this package has a dependency on the library ‘mylib’. This lib will be usually installed automatically with ‘myprogram’. When you delete ‘myprogram’, mylib might still remain in the system. Thus mylib, in this case, becomes an orphaned package.

Now, the command listed in point 1 removes such orphaned packages. But imagine the case where you had manually installed mylib before installing myprogram. The command ‘apt autoremove’ might not remove the orphaned package in this case. And hence you’ll have to manually delete it.

You’ll have to find all the orphaned packages first and then remove them. Thankfully, we have a GUI tool to do that: gtkorphan, a graphical frontend for deborphan.

Install gtkorphan via the terminal:

And to remove orphaned packages, search for Removed Orphaned Package tool and run it to find all the orphaned packages in your system:

Honestly, I won’t go for this option unless you really need every Mb of free space.

Bonus Tip: Using GUI tools to free space in Ubuntu

We saw a number of command line options to make space in Linux system but I understand if you don’t want to use the commands.

Remembering all the commands or using them all one by one may not be convenient for you. And this is why we have a number of GUI tools that will help you do that in a few clicks with an easy to use interface.

Stacer is one such tool that you could use. You can read this article to know how to use Stacer in Ubuntu.

You can check out more tools to clean up Ubuntu and make some free space easily.

Wrapping up

So, you saw a number of ways to clean up Ubuntu system. Personally, I use apt-get autoremove more often than any other commands here. Regularly using this command keeps the system free from unnecessary files.

I hope this article helped you to make free space in Ubuntu, Linux Mint and other such distributions. Do let me know if this worked for you or if you have some other tip to share.

Like what you read? Please share it with others.

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Solve problems with insufficient disk space in Linux

Check the usage of disk space
Command: DF -H
The following diagram disk space is normal (sample disk space is full: / dev / sad1 18g 18g 18g 100% /)

Situation 1: Insufficient disk space

Find the largest file based on the command layer. Delete unnecessary files

1. View the situation of disk usage in the root directory, maximum use as / home folder

2. Find the size of file size in the maximum use of folders (/ home)

Use this class to find out the disk occupy the maximum or useless file to delete

Situation 2: The file has been deleted, the process is not released (my problem is here)

When the use of disk space is used. Directory files are reasonably used. Consider whether it is a process

When a file is being used by a process, the user deletes this file, and the file will only be deleted from the directory structure, but there is no deletion from disk. When the process of this file is used, the file will really be deleted from the disk, release the space occupied.

The usual output format of LSOF is:

Commonly included, for example, the following fields

solve:

Situation 3: I (indeoe) node is not enough

• There are some metadata called «I Node Inode» in the file system that is used to save the file. Many file systems are fixed, so it is likely that the i node has been exhausted and the file system itself is still not used. You can use DF to check.
• The number of nodes is fixed and cannot be expanded. When the i node is full, you can only delete some useless nodes

Intracks:
1, timing tasks produce a large number of trivial small files
2, postfix is ​​not a maildrop file (/ var / spoor / postfix / maildrop /)
3, / DATA / CACHE / OPT / NewCache / TMP, etc.

Solve the problem:

• I node knowledge is lacking to learn. Please refer to other additional information

I have a mistake in work again. There is a pit, don’t be afraid. Learn to fill the pit.

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