DISK SPACE REDUCTION

Dear all,

I am using centos7. I am facing issue in the  disk space ( "/dev/mapper/centos-root" )i am not installing anything new , still daily 100 Mb space is reduction. infact, sometimes when system turn off due to power cut and when i turn on the system, i always found reduction in the the disk space. please help meinknowing the reason for this

Ballooning log files, typically. Look at enabling logrotate to keep them at a manageable size. You can also truncate them currently if you don't need the log info they contain.