Hi Sachchidanand,
On Unix-like operating systems, if a process has a file open, and you delete the file, it will not be removed from disk immediately. That will only happen when the process closes the file descriptor, or exits. People new to Unix-like operating systems often don't know this.
So you may have one or more such files on your / partition. Install a utility called "lsof", run "lsof -n" as root, and grep the output for the word "deleted", and examine those files, and see which processes are holding them open. Then either restart those processes, or reboot the server.
Regards, Anand Buddhdev
On 29/06/2020 11:51, Sachchidanand Upadhyay via CentOS wrote:
Hi,
While checking with df -h, it's showing the used space is 94% on root (/). If checked with du -sh, it's not showing the used space.
# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 7.8G 0 7.8G 0% /dev tmpfs 7.8G 0 7.8G 0% /dev/shm tmpfs 7.8G 857M 7.0G 11% /run tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup /dev/mapper/centos-root 50G 47G 3.4G 94% / /dev/mapper/centos-home 241G 47G 195G 20% /var/log /dev/sda1 1014M 189M 826M 19% /boot tmpfs 1.6G 0 1.6G 0% /run/user/0 tmpfs 1.6G 0 1.6G 0% /run/user/1002
# du -sh /* 0 /bin 156M /boot 0 /dev 33M /etc 388K /home 0 /lib 0 /lib64 0 /media 0 /mnt 0 /opt du: cannot access ‘/proc/21489/task/21489/fd/4’: No such file or directory du: cannot access ‘/proc/21489/task/21489/fdinfo/4’: No such file or directory du: cannot access ‘/proc/21489/fd/4’: No such file or directory du: cannot access ‘/proc/21489/fdinfo/4’: No such file or directory 0 /proc 6.1M /root 857M /run 0 /sbin 0 /srv 0 /sys 0 /tmp 2.8G /usr 62G /var
# du -sh /var/* 0 /var/adm 89M /var/cache 0 /var/crash 8.0K /var/db 0 /var/empty 0 /var/games 0 /var/gopher 0 /var/kerberos 16G /var/lib 0 /var/local 0 /var/lock 47G /var/log 0 /var/mail 0 /var/nis 0 /var/opt 0 /var/preserve 0 /var/run 98M /var/spool 0 /var/tmp 499M /var/www 0 /var/yp
How can i find this hidden space?