I’m guessing that every Linux admin saw this alarming message: “No space left on device”. First thing you are doing is check disk usage of course:

# df -h
 Filesystem              Size  Used Avail Use% Mounted on
 /dev/mapper/vg-lv_root   18G   13G  3.4G  80% /

What is going on? There is a lot of free space! Continue Reading

Rsync is a very powerful  backup tool. It can significantly speed up backup process and minimize amount of data transferred during synchronization. In most cases rsync is used to make incremental backups, but it also has another interesting option which gives you ability to keeping old versions of files on backup server. Mentioned option is ‘–backup’ or simply ‘-b’. Continue Reading