介绍两个命令
#查看磁盘使用情况
df -h
#查看inode使用情况
df -i
2.block满了
[root@linux ~]# cd /logs/
[root@linux logs]# ls -lh /bin/ls
-rwxr-xr-x. 1 root root 107K Mar 23 02:52 /bin/ls
[root@linux logs]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdc 73K 14K 55K 21% /app/logs
[root@linux logs]# cp /bin/ls .
cp: writing `./ls': No space left on device
[root@linux logs]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdc 73K 70K 0 100% /app/logs
[root@linux logs]#
3.inode用光了
[root@linux]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdc 73K 14K 55K 21% /app/logs
[root@linux logs]# df -i
Filesystem Inodes IUsed IFree IUse% Mountedon
/dev/sdc 16 11 5 69% /app/logs
[root@linux logs]# touch a{1..6}txt
touch: cannot touch `a6txt': No space left ondevice
[root@linux logs]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdc 73K 14K 55K 21% /app/logs
[root@linux logs]# df -i
Filesystem Inodes IUsed IFree IUse% Mountedon
/dev/sdc 16 16 0 100% /app/logs
[root@linux logs]#
4.no space left on device（磁盘空间不足）解决办法
过程演示
（1）创建大文件
[root@linuxidc ~]# seq 500000000 > /var/log/messages
（2）查看磁盘使用情况
[root@linux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 19G 6.1G 12G 35% /
（3）删除日志文件/var/log/messages
[root@linux ~]# rm -rf /var/log/messages
（4）查看空间是否被释放
[root@linux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 19G 6.1G 12G 35% /
（5）查看文件还被哪些进程调用
[root@linux ~]# lsof | grep delete
rsyslogd 2839 root 1w REG 8,3 4888888898 393106 /var/log/messages (deleted)
（6）重启对应的服务
[root@linux ~]# /etc/init.d/rsyslog restart
Shutting down system logger: [ OK ]
Starting system logger: [ OK ]
（7）检查磁盘使用情况
[root@linux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 19G 1.5G 17G 9% /
