linux shell

总核数 = 物理CPU个数 X 每颗物理CPU的核数

总逻辑CPU数 = 物理CPU个数 X 每颗物理CPU的核数 X 超线程数

查看物理CPU个数

• cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l

查看每个物理CPU中core的个数(即核数)

• cat /proc/cpuinfo| grep "cpu cores"| uniq

查看逻辑CPU的个数

• cat /proc/cpuinfo| grep "processor"| wc -l

添加用户到sudo

• set a special rule for this user in the /etc/sudoers file using the following (note that there is no %, which is used to denote a group):
• oracle ALL=(ALL:ALL) ALL
• usermod -a -G wheel felix //注意改成你自己的用户名

scp example

• scp -r root@192.168.62.10:/root/ .

批量杀死进程

• ps -ef | grep oracle | grep -v grep | awk '{print "kill -9 "$2}' | sh

计算多少行

• ps -ef |wc -l