标签:进程 mit buffer shell time one user arm swap分区
1.文件整理
employee文件中记录了工号和姓名
employee.txt:
100 Jason Smith
200 John Doe
300 Sanjay Gupta
400 Ashok Sharma
bonus文件中记录工号和工资
bonus.txt:
100 $5,000
200 $500
300 $3,000
400 $1,250
要求把两个文件合并并输出如下
处理结果:
400 ashok sharma $1,250
100 jason smith $5,000
200 john doe $500
300 sanjay gupta $3,000
# awk ‘ARGIND==1{test[$1]=$0}ARGIND==2{print test[$1],$2}‘ employee.txt bonus.txt 100 Jason Smith $5,000 200 John Doe $500 300 Sanjay Gupta $3,000 400 Ashok Sharma $1,250 # cat employee.txt 100 Jason Smith 200 John Doe 300 Sanjay Gupta 400 Ashok Sharma # cat bonus.txt 100 $5,000 200 $500 300 $3,000 400 $1,250
(2)查看swap分区的大小
# free -m total used free shared buffers cached Mem: 1001 861 140 18 97 425 -/+ buffers/cache: 338 663 Swap: 509 0 509
(3)root用户今天登陆了多长时间
last查所有登陆信息,
lastlog查看最近登陆,
w或者who查看目前已经登陆用户
(4)打印当前sshd的端口和进程id
# netstat -anp | grep sshd
(5)打印root可以使用可执行文件数
# echo "root’s bins: $(find ./ -type f | xargs ls -l | sed ‘/-..x/p‘ | wc -l)"
root’s bins: 53
(6)输出本机创建20000个目录所用的时间
# time for i in {1..2000} ; do mkdir neil$i; done real 0m2.086s user 0m0.180s sys 0m0.300s [berry@berry:dirs] time real 0m0.000s user 0m0.000s sys 0m0.000s
标签:进程 mit buffer shell time one user arm swap分区
原文地址:http://www.cnblogs.com/Berryxiong/p/6291247.html