Stephen R Guglielmo wrote: > I updated my apt repo and there was a kernel update. I ran the update, > and received an error claiming "no space left on device." Normally, I > would do a force-uninstall for the currently running kernel (freeing > space), then install the new kernel and reboot. However, this is an > update, not a replacement. I'm not sure how to proceed. When I > installed this system, I selected automatic partitioning with an > encrypted LVM, so I imagine resizing the partition would prove > difficult. I'm not sure why the automatic partitioner didn't provide > for enough space for future updates. See below for the relevant logs. > This is on Debian Jessie.
> Filesystem Size Used Avail Use% Mounted on > /dev/mapper/lapsdeb-root 314M 237M 57M 81% / Very small. > /dev/mapper/lapsdeb-home 274G 8.5G 252G 4% /home Very large. (The default for the debian-installer is to give all of the remaining space to the last partiton. IMNHO that is bad.) > /dev/mapper/lapsdeb-usr 8.2G 2.6G 5.2G 34% /usr Using less than 3G for /usr. If it were me I would back up /home to some place else. Verify that /home is backed up. Then I would lvremove /dev/lapsdeb/home to free up that large amount of disk space. Having that free disk space available for use I would then 'lvextend -L+3G /dev/lapsdeb/root' to add some of that space to it. Use 'resize2fs /dev/lapsdeb/root' to do an online expansion of the root file system to the now larger space. Then I would 'lvcreate -L100G -nlapsdeb home' to create a new /home partition. Use mkfs to create the file system. Mount it. Then restore /home from backup. That would give a fully working system rather easily without need for re-installing anything. (Other than the backup and restore of /home to reclaim some of that space.) Sizes are of course open for changes. /home is only using 8.5G now. I start with 100G and be flexible from there. that would leave somewhere around 150G of free space in LVM available for future online expansion whenever needed. LVM works very nicely for expanding space and resize2fs can increase the size of file systems online. Works very well. Shrinking filesystems with resize2fs on the other hand does not work well. Avoid shrinking. That is why I would backup, remove, recreate, restore rather than shrinking. My Wheezy 7 media machine has a little more than 3G in /usr. When using a separate /usr the root partition doesn't need to be very big at all. Filesystem Size Used Avail Use% Mounted on rootfs 5.5G 643M 4.6G 13% / /dev/mapper/v6-usr 28G 3.2G 23G 13% /usr As you can see I have not bothered with converging / and /usr together yet on my machine. At some point I might be forced into do so. If I were then I would expand the root fs as much as needed then boot using the debian-installer in rescue mode then copy the /usr partition up to / and remove the /usr partition and the entry from /etc/fstab. Then reboot to the new system without a separate /usr. (Creating a separate /usr is the same thing in reverse.) This kind of file system surgery with LVM and resize2fs is actually quite easy. It is however file system surgery and as with any surgery care must be taken to ensure a good result. Not for the faint of heart. Always make sure you have a good full backup in case a mistake is made along the way. Bob
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