Ubuntu 14.04无法更新，执行apt-get -f install提示设备无剩余空间
Hey there, let's get this sorted out—your /boot partition being 84% full is almost definitely why your software updater is crashing and you're hitting dependency errors with apt-get -f install. Old kernel packages are the usual culprit here, taking up space that new updates need. Here's how to fix it:
Step 1: List all installed kernel packages
First, let's see which kernels are taking up space. Run this in the terminal:
dpkg --list | grep linux-image
You'll see a list of packages like linux-image-3.13.0-XXX-generic. The ones marked ii are fully installed, and rc are leftover config files we can clean up later.
Step 2: Check your currently running kernel
Never delete the kernel you're currently using—that could leave your system unbootable! To find out which kernel you're running right now:
uname -r
Note down this version number (e.g., 3.13.0-170-generic)—we'll skip this one when deleting old kernels.
Step 3: Remove old, unused kernels
Now we can safely delete the kernels you're not actively using. You can either delete them one by one (replace <version> with the kernel number from Step 1):
sudo apt-get purge linux-image-<version>-generic
Or use a single command to batch remove all non-running kernels automatically:
sudo apt-get purge $(dpkg --list | grep -E '^ii linux-image-[0-9]' | grep -v $(uname -r) | awk '{print $2}')
When prompted, type Y and press Enter to confirm the deletion.
Step 4: Clean up leftover files
Next, remove any leftover unused dependencies and cached package files to free up even more space in /boot and elsewhere:
sudo apt-get autoremove sudo apt-get clean
Step 5: Resolve the dependency errors
Now that we've freed up enough space in /boot, run the command that was failing before to fix the unmet dependencies:
sudo apt-get -f install
This should now complete without errors, since there's finally space to install any required packages.
A quick heads-up
Ubuntu 14.04 LTS reached its end-of-life in April 2019, so official security updates and support are no longer available. If you plan to keep using this system long-term, it's a good idea to upgrade to a supported Ubuntu version. But for now, this fix should get your software updater working again.
内容的提问来源于stack exchange，提问作者Andrei
