查看磁盘使用情况

[root@localhost games]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup-lv_root

50G 45G 2.2G 96% /

tmpfs 3.8G 8.0K 3.8G 1% /dev/shm

/dev/sda8 477M 52M 400M 12% /boot

/dev/mapper/VolGroup-lv_home

241G 84G 146G 37% /home

查看目录大小

[root@localhost games]# du -sm /*

7 /bin

50 /boot

1 /cgroup

1 /db_logs

1 /dev

65 /etc

85189 /home

303 /lib

22 /lib64

1 /lost+found

1 /media

1 /mnt

73 /opt

62 /pgdatabase

1 /pglog

du: cannot access `/proc/26342/task/26342/fd/4': No such file or directory

du: cannot access `/proc/26342/task/26342/fdinfo/4': No such file or directory

du: cannot access `/proc/26342/fd/4': No such file or directory

du: cannot access `/proc/26342/fdinfo/4': No such file or directory

0 /proc

326 /root

12 /sbin

1 /selinux

1 /srv

0 /sys

401 /tmp

16333 /usr

27890 /var

查看指定目录所属分区

[root@localhost games]# df -h /usr

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup-lv_root

50G 45G 2.2G 96% /

查看目录下子目录大小

[root@localhost usr]# du -sm /usr/*

251 /usr/bin

1 /usr/etc

1 /usr/games

24 /usr/include

1022 /usr/java

129 /usr/lib

236 /usr/lib64

31 /usr/libexec

4846 /usr/local

1 /usr/pgsql

43 /usr/pgsql-10

161 /usr/sbin

553 /usr/share

1 /usr/src

0 /usr/tmp

9043 /usr/workspace

[root@localhost workspace]# du -sm ./*

116 ./apache-tomcat-8.5.4-8079

489 ./apache-tomcat-8.5.4-8080

680 ./dataCollection

587 ./gerrit-server

5717 ./intefaceDocGitRepo

84 ./intialDatabase

1 ./links

1 ./logs

68 ./openfire

30 ./openfire_push

805 ./scrapyProject

1 ./shawn.xls

1 ./shawn.xlsx

24 ./showdoc-master

391 ./sonarqube-5.5

56 ./springboot

3 ./StaticGenerateTable

删除当前目录下所有文件：

rm -rf ./*