静态iP配置

vi /etc/sysconfig/network-scripts/ifcfg-eth0
    DEVICE="eth0"  
    BOOTPROTO="STATIC"   //手动
    DHCP_HOSTNAME="ni-probe-default"
    HWADDR="E4:1F:13:44:47:E0"
    IPV6INIT="no"
    IPADDR=10.128.9.222      //手动
    GATEWAY=10.128.9.254    //手动
    NETMASK=255.255.255.0     //手动
    NM_CONTROLLED="no"
    ONBOOT="yes"    //手动
    TYPE="Ethernet"
    UUID="e3743eaa-95f4-4513-aa47-ea2c14104723"
    #DNS=219.141.140.10
    DNS1=202.106.196.115    //手动
    DNS2=8.8.8.8        //手动

linux更新yum源

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
yum clean all
yum makecache
yum -y install glib2

centos6升级glibc到2.14

/lib64/libc.so.6: version `GLIBC_2.14' not found 
strings /lib64/libc.so.6 |grep GLIBC
下载：
glibc-2.14.1-6.x86_64.rpm
glibc-common-2.14.1-6.x86_64.rpm
glibc-devel-2.14.1-6.x86_64.rpm
glibc-headers-2.14.1-6.x86_64.rpm

rpm -Fhv glibc*

误删/lib64/libm.so.6

export LD_PRELOAD=/lib64/libc-2.14.1.so
ls -ltr
重建软连接
ldconfig

文件夹大小

du -h --max-depth=1                  当前文件夹大小
du -hm --max-depth=2 | sort -n
du -hm --max-depth=2 | sort -nr | head -12

大文件查找

find . -type f -size +800M                     找文件
find . -type f -size +800M  -print0 | xargs -0 ls -l
find . -type f -size +800M  -print0 | xargs -0 du -h
find . -type f -size +800M  -print0 | xargs -0 du -hm | sort -nr

I/O

iostat -dmx 5 10

kill多次启动的进程

ps -ef | grep -i tcpreplay | grep -v grep | awk '{print $2}' | xargs kill -9

清空缓存

sync
echo 1 > /proc/sys/vm/drop_caches

CPU消耗top10

ps auwx | sort -rn -k3 | head -10

传输文件

rz -b
sz file

网络相关信息

netstat -anp  |   grep

root无法修改权限

yum remove e2fsprogs
yum -y install e2fsprogs
lsattr filename
chattr -i filename

网卡型号

lspci | grep Eth