2020-07-16常用有趣命令之shell管理

1.进程的批量kill

ps -ef |grep -v "root"|grep  "keyword"|awk '{print $2}'|xargs kill -9

2.进程并行化之软件

软件一：ParaFly:
https://github.com/ParaFly/ParaFly

示例，用服务器一半CPU运行程序：

echo "ls ~
df
ls -lh ~/bin" > bashfile
cpus=$( ls -d /sys/devices/system/cpu/cpu[[:digit:]]* | wc -w |awk '{print $1/2}')
ParaFly -c bashfile -CPU $cpus

# Usage: ParaFly (opts)
# Required:
#   -c <str>              :filename containing list of bash-style commands to execute.
#   -CPU <int>            :number_of_threads
#
# Optional:
#   -shuffle              :randomly shuffles the command order.
#   -failed_cmds <str>    :filename to capture failed commands.  default("FailedCommands")
#   -v                    :simple progress monitoring.
#   -vv                   :increased verbosity in progress monitoring.

软件二：parallel
官网
Linux下的并行神器——parallel

软件三：pwait
https://github.com/wting/pwait or https://github.com/diazona/pwait

3.bash最简单的并行化--- 后台运行& + wait函数

#串行执行，耗时30秒
for ((i=1;i<=3;i++));do 
  { 
    sleep 3
    echo "Job $i is DONE"
  }
done

#并行执行，耗时3秒
for ((i=1;i<=3;i++));do 
  { 
    sleep 3
    echo "Job $i is DONE"
  } &
done
wait