Troubleshoot - by Hostrare
VirtFS gives a detained shell situation for users who compare to a server via SSH. The confined shell acts as a container for the user and does not support the user to obtain other users’ home records on the server. Unlike a regular shell situation, a confined shell situation prevents way to data outside of the user’s home record.
Consuming lot of disk space ?
Most of the servers got large disk area due to these virtfs. You can Damage VirtFS, Remove VirtFS and Unmount the bind mounts. CPanel provides a script to remove the virtfs mounts. Remove virtfs and Disable for users in your Cpanel server
Do not delete /home/virtfs/username folder directly because its hard link with user account.
Do not delete /home/virtfs/username folder directly because it's a hard link with the user account.
To damage VirtFS, system managers can damage jailed shell way through WHM’s Tweak Settings interface (Home >> Server Configuration >> Tweak Settings) and Manage Shell Access interface for that Cpanel user account WHM >> Account Functions >> Manage Shell Access.
Then use the next requirements whether it's still possible.
# grep username /etc/passwd
If it does, you’ll require to replace it with Bash or any other shell.
# crontab -l -u username
If you notice SHELL=”/usr/local/cpanel/bin/jailshell” in the output, you’ll need to edit user’s crontab and delete that line.
#w | grep -i username
If it is, you should inform him to log out or, if you feel like it, you can log him out by yourself.
You can unmount all active VirtFS mounts
You can verify mount point for particular account
#grep -i username /proc/mounts
you will some thing like this
root@cpanel# cat /proc/mounts | grep username
/dev/xvda1 /home/virtfs/username/lib ext3 ro,nosuid,relatime,errors=continue,user_xattr,acl,barrier=0,data=ordered,jqfmt=vfsv0,usrjquota=quota.user 0 0
/dev/xvda1 /home/virtfs/username/bin ext3 ro,nosuid,relatime,errors=continue,user_xattr,acl,barrier=0,data=ordered,jqfmt=vfsv0,usrjquota=quota.user 0 0
/dev/loop0 /home/virtfs/username/var/tmp ext3 rw,nosuid,noexec,relatime,errors=continue,barrier=1,data=ordered 0 0
devtmpfs /home/virtfs/username/dev devtmpfs rw,nosuid,noexec,relatime,size=1002360k,nr_inodes=250590,mode=755 0 0
/dev/xvda1 /home/virtfs/username/usr/sbin ext3 ro,relatime,errors=continue,user_xattr,acl,barrier=0,data=ordered,jqfmt=vfsv0,usrjquota=quota.user 0 0
/dev/xvda1 /home/virtfs/username/home/username ext3 rw,noatime,errors=continue,user_xattr,acl,barrier=0,data=ordered,jqfmt=vfsv0,usrjquota=quota.user 0 0
then you should unmount and then remove it
#for i in `cat /proc/mounts | grep /home/virtfs | cut -d ‘ ‘ -f 2 ` ; do umount $i ; done
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