Can't create/write to file '/tmp/ (Errcode: 30)

This does apply to cPanel servers only!


Stop all processes that have files open on /tmp such as MySQL and other applications using:

/usr/sbin/lsof /tmp

Run the following commands (in that order):

/bin/umount -l /tmp
/bin/umount -l /var/tmp
/bin/rm -fv /usr/tmpDSK


This should create a new /tmp partition for you. That's all

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