No space left on CentOS/RHEL Server
Sometime you Can’t write to the hard disk on a Linux or Unix-like systems? or in other words we can say that we face issue “No space left on device”, although partition was not nearly full. So Need to analyze corrupt disk issues on a server? Need to figure out why you are getting “disk full” messages?
Want to solve full/corrupt and failed disk issues. Below is the solution for this problem.
1. Check available disk space
First need to check the available disk space on server.
# df -h
Output:
Filesystem Size Used Avail Use% Mounted on /dev/md2 909G 648G 216G 76% / tmpfs 3.9G 0 3.9G 0% /dev/shm /dev/md1 283M 47M 222M 18% /boot
Note: -h: print sizes in human readable format
2. Check available Inodes
After checking disk we need to check the available Inodes on server. Use following command to check Inodes:
# df -ih
Output:
Filesystem Inodes IUsed IFree IUse% Mounted on /dev/md2 58M 58M 0 100% / tmpfs 977K 1 977K 1% /dev/shm /dev/md1 76K 44 76K 1% /boot
Note: -i: list Inode information instead of block usage
If IUse% is 100%, then huge number of small files is the reason for “No space left on device” errors.
3. Find Files or Directory
Below command will list directories with unusually high number of files.
# for i in /*; do echo $i; find $i |wc -l; done
This command will list directories and number of files in them. Once you see a directory with unusually high number of files (or command just hangs over calculation for a long time), repeat the command for that directory to see where exactly the small files are.
# for i in /opt/*; do echo $i; find $i |wc -l; done
4. Delete the files
Once you found the files which are consuming highest no. of Inodes. Just delete that files
# sudo rm -rf /home/bad_user/directory_with_lots_of_empty_files
4. Check the Inodes again
You need to check Inodes again using df command:
# df -ih
Output:
Filesystem Inodes IUsed IFree IUse% Mounted on /dev/md2 58M 13M 45M 23% / tmpfs 977K 1 977K 1% /dev/shm /dev/md1 76K 44 76K 1% /boot
