笑着做学生的博客

1.查看root和home下的容量[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/cl-root 50G 952M 50G 2% /devtmpfs 63G 0 63G 0% /devtmpfs 63G 0 63G 0% /dev/shmtmpfs

刚装了centos7集群机器，想把主机名统一换成bigdata1、bigdata2……1.查看当前主机名[root@localhost ~]# hostnamectl Static hostname: localhost.localdomain Icon name: computer-server Chassis: server Machine ID: b398178be14e44da8a010a943386a0ef