yum update更新的时候，内存不足溢出完蛋了，安装包出现很多duplicate之类的。

rpm -e --nodeps `package-cleanup --dupes|awk '{ a=1-a; if(!a) print $0 }'`

There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.

yum-complete-transaction --cleanup-only

怎么查看磁盘使用情况？

df -h

用了centmin之后磁盘空间不够了怎么办？

ccache -C

du -sh /svr-setup

cd /svr-setup/
rm -rf /svr-setup/*

cd /usr/local/nginxbackup
rm -rf /usr/local/nginxbackup/nginxdirbackup/*
rm -rf /usr/local/nginxbackup/confbackup/*

不记得nginx的路径了

which nginx

或

ps aux | grep nginx