1、 显示目前所有文件系统的可用空间及使用情形，h表示使用 GB、MB 等易读的格式
[root@rusky ldap]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 3.8G 1.9G 1.8G 51% /
/dev/sda1 46M 9.2M 35M 22% /boot
tmpfs 506M 0 506M 0% /dev/shm
/dev/sda3 14G 2.5G 11G 19% /home
.host:/ 83G 38G 46G 45% /mnt/hgfs ----这个是挂载的主机与vmware共享文件夹所在的分区情况
2、查看该文件夹的总大小
[root@rusky ldap]# du -h --max-depth=0 apache-tomcat-6.0.37/bin
323K apache-tomcat-6.0.37/bin
4、显示apache-tomcat-6.0.37这个文件夹里各个文件或文件夹的大小
[root@rusky ldap]# du -h --max-depth=0 apache-tomcat-6.0.37/*
324K apache-tomcat-6.0.37/bin
100K apache-tomcat-6.0.37/conf
2.7M apache-tomcat-6.0.37/lib
19K apache-tomcat-6.0.37/LICENSE
0 apache-tomcat-6.0.37/logs
512 apache-tomcat-6.0.37/NOTICE
4.5K apache-tomcat-6.0.37/RELEASE-NOTES
8.5K apache-tomcat-6.0.37/RUNNING.txt
0 apache-tomcat-6.0.37/temp
2.2M apache-tomcat-6.0.37/webapps
0 apache-tomcat-6.0.37/work
5、查看单个文件的大小
[root@rusky bin]# du -h bootstrap.jar
12K bootstrap.jar
====================
[root@rhel7 /]# du -sh /usr 803M /usr [root@rhel7 /]# du -ch /usr/ --递归目录里所有文件，列出大小，最后总和。 ...... 4.0K /usr/libexec/os-probes/init 8.0K /usr/libexec/os-probes/mounted/efi 68K /usr/libexec/os-probes/mounted 80K /usr/libexec/os-probes 24K /usr/libexec/plymouth 0 /usr/libexec/tuned 32K /usr/libexec/man-db 8.2M /usr/libexec/postfix 12M /usr/libexec 0 /usr/local/bin 0 /usr/local/etc 0 /usr/local/games 0 /usr/local/include 0 /usr/local/lib 0 /usr/local/lib64 0 /usr/local/libexec 0 /usr/local/sbin 0 /usr/local/share/applications 0 /usr/local/share/info 0 /usr/local/share/man/man1 0 /usr/local/share/man/man1x 0 /usr/local/share/man/man2 0 /usr/local/share/man/man2x 0 /usr/local/share/man/man3 0 /usr/local/share/man/man3x 0 /usr/local/share/man/man4 0 /usr/local/share/man/man4x 0 /usr/local/share/man/man5 0 /usr/local/share/man/man5x 0 /usr/local/share/man/man6 0 /usr/local/share/man/man6x 0 /usr/local/share/man/man7 0 /usr/local/share/man/man7x 0 /usr/local/share/man/man8 0 /usr/local/share/man/man8x 0 /usr/local/share/man/man9 0 /usr/local/share/man/man9x 0 /usr/local/share/man/mann 4.0K /usr/local/share/man 4.0K /usr/local/share 0 /usr/local/src 8.0K /usr/local 0 /usr/src/debug 0 /usr/src/kernels 0 /usr/src 803M /usr/ 803M total [root@rhel7 /]# du -h --max-depth=0 /usr/ ----该命令等同于：du -sh /usr 803M /usr/ [root@rhel7 /]# du -h --max-depth=1 /usr/ ---统计第1级目录的大小，最后也有总的大小 54M /usr/bin 38M /usr/sbin 372M /usr/lib 123M /usr/lib64 202M /usr/share 0 /usr/etc 0 /usr/games 5.3M /usr/include 12M /usr/libexec 8.0K /usr/local 0 /usr/src 803M /usr/ [root@rhel7 /]#