How can I reallocate disk space in Linux?
Asked by
TechWanderer42
Hey everyone! I'm new to Linux and this is my first time posting here. I'm having a bit of an issue where one of my disks is getting low on space, while another one appears to have some available room. I'm trying to figure out how to reallocate some of that space to my main disk, which is mounted at /dev/mapper/ubuntu--vg-ubuntu--lv. I'm providing the output of the df -h command below, and I would really appreciate some step-by-step guidance on how to do this! Thanks!
```bash
df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 3.2G 3.0M 3.2G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 98G 82G 12G 88% /
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 261M 1.6G 15% /boot
/dev/sda1 1.1G 6.1M 1.1G 1% /boot/efi
tmpfs 3.2G 72K 3.2G 1% /run/user/134
tmpfs 3.2G 60K 3.2G 1% /run/user/1000
```
Answers
If you're still getting used to Linux, I recommend checking out some tutorials on using the Gnome Disk Utility (often just called Disks). It's quite user-friendly for basic tasks. For more advanced options, consider using gParted.
However, without seeing your entire partition layout, I would hesitate to give specific commands. Maybe if someone else here has more experience, they could jump in with advice!
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It looks like you're using LVM, which is great because it allows you to expand logical volumes if there's space available. One option is to find out what's taking up your space first. If you're okay with it, consider adding a USB drive or another internal drive for more storage. You could then move directories like /var to the new drive and update your /etc/fstab to mount it at boot.
But seriously, figure out what's filling up your disk first! If it's stuff like /var/log growing too large, setting up log rotation properly can often help. It's not unusual to need some tweaking after the initial setup!
TechWanderer42: This server is running Zabbix with a MySQL database. I checked /var/log, and everything looks normal with log rotation, but I’ll keep an eye out. How do I access the LVM tool?
LinuxLegend: You might also want to check for old, unused kernels. Sometimes package managers leave them behind, which can take a lot of space. You can clean those up too!
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Can you reformat the df output? The current layout is hard to read. Switch to markdown and wrap it in a code block! Just use three backticks before and after your command output to keep the formatting intact.
Example:
```
df -h
```
Also be sure to check you're using backticks (`), which are on the same key as the tilde (~).
TechWanderer42: Great tip! I didn’t know about using code blocks. Just reformatted it.
Reply to this answer
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TechWanderer42: Thanks for the suggestion! I'll look into those tools.