netstat   -anp   |   grep  8888

cd -

tcpdump -n -i eth0 port 8080

nohup jupyter notebook --port 8888  --ip=172.18.122.70 --allow-root &

scp -P 18999  www@180.153.50.**:/home/HByw_root/www.war ./

权限

chown -R jenkins:jenkins maven3.5.3

jenkins 没有docker 权限

gpasswd -a jenkins docker

service jenkins restart 需要重启

--------open file--------

ulimit -a ulimit -n 2048 vim /etc/security/limits.conf   在最后加入   * soft nofile 4096   * hard nofile 4096  

查看线程

top -H -p 707

---------------mysql--------------

mysql -h192.168.172.** -uroot -p*********

desc table_name;

show create table table_name;

show processlist

select concat('KILL ',id,';') from information_schema.processlist where user='root'and db = 'onlineshow';

   

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