This is driving me crazy! My server run out of space. I cleaned up some files by removing the folders. The amount of free space didn't go up (% wise). This is what I now see:
As you can see, it shows 315gb size, of which 298gb is in use. So why does it show 100% used? The only reason I have the 1.1gb free that you can see if due to removing more files are reboot. Even though I got rid of 15+gb of files before :/
I've tried quite a few things such as lsof +L1:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NLINK NODE NAME
php-fpm7. 726 root 3u REG 8,0 0 0 605 /tmp/.ZendSem.sRUIJj (deleted)
mysqld 863 mysql 5u REG 8,0 0 0 2938 /tmp/ibj2MjTy (deleted)
mysqld 863 mysql 6u REG 8,0 0 0 10445 /tmp/ibgsRaLu (deleted)
mysqld 863 mysql 7u REG 8,0 0 0 76744 /tmp/ibx2g3Cq (deleted)
mysqld 863 mysql 8u REG 8,0 0 0 76750 /tmp/ib7D93oi (deleted)
mysqld 863 mysql 12u REG 8,0 0 0 77541 /tmp/ibSr0xre (deleted)
dovecot 1278 root 139u REG 0,23 0 0 2021 /run/dovecot/login-master-notify6ae65d15ebbecfbf (deleted)
dovecot 1278 root 172u REG 0,23 0 0 2022 /run/dovecot/login-master-notify4b18cb63ddb75aab (deleted)
dovecot 1278 root 177u REG 0,23 0 0 2023 /run/dovecot/login-master-notify05ff81e3cea47ffa (deleted)
cron 2239 root 5u REG 8,0 0 0 1697 /tmp/#1697 (deleted)
cron 2240 root 5u REG 8,0 0 0 77563 /tmp/#77563 (deleted)
sh 2243 root 10u REG 8,0 0 0 1697 /tmp/#1697 (deleted)
sh 2243 root 11u REG 8,0 0 0 1697 /tmp/#1697 (deleted)
sh 2244 root 10u REG 8,0 0 0 77563 /tmp/#77563 (deleted)
sh 2244 root 11u REG 8,0 0 0 77563 /tmp/#77563 (deleted)
imap-logi 2512 dovenull 4u REG 0,23 0 0 2023 /run/dovecot/login-master-notify05ff81e3cea47ffa (deleted)
imap-logi 3873 dovenull 4u REG 0,23 0 0 2023 /run/dovecot/login-master-notify05ff81e3cea47ffa (deleted)
pop3-logi 3915 dovenull 4u REG 0,23 0 0 2021 /run/dovecot/login-master-notify6ae65d15ebbecfbf (deleted)
pop3-logi 3917 dovenull 4u REG 0,23 0 0 2021 /run/dovecot/login-master-notify6ae65d15ebbecfbf (deleted)
php-fpm7. 4218 fndesk 3u REG 8,0 0 0 605 /tmp/.ZendSem.sRUIJj (deleted)
php-fpm7. 4268 executive 3u REG 8,0 0 0 605 /tmp/.ZendSem.sRUIJj (deleted)
But I can't see anything in there that is locking the files up
Best Answer
Find out what is eating up the disk space, and then find out why, before deleting something.
To show the "Top 10 directories", you could use
du -Sh / | sort -rh | head -10.To show the "Top 10" files", you could use
find / -type f -exec du -Sh {} + | sort -rh | head -n 10.Often you will find huge or not rotated log files, of fast-filling log files. Depending on your findings, it is sometimes enough to delete some older log files, or to configure log rotate, or to configure the log-settings of your services.
Regarding your calculation: This does not have to drive you crazy :-)
Often filesystems reserve 5% space for use by the root user. You have 315G disk size, so 5% would be ~16G reserved space. There is a nice article which explains the background: https://blog.tinned-software.net/utility-df-shows-inconsistent-calculation-for-ext-filesystems/