进程和计划练习

╰+攻爆jí腚メ 2023-08-17 17:18 41阅读 0赞

1、通过ps命令的两种选项形式查看进程信息

![1737809-20190808194056527-1130390654.png][]

![1737809-20190808194101462-347877442.png][]

2、通过top命令查看进程

![1737809-20190808194110847-218274919.png][]

3、通过pgrep命令查看sshd服务的进程号

![1737809-20190808194117686-356253998.png][]

4、查看系统进程树

![1737809-20190808194122882-340570567.png][]

5、使dd if=/dev/zero of=/root/file bs=1M count=8190 命令操作在前台运行

![1737809-20190808194127940-1003152800.png][]

6、将第5题命令操作调入到后台并暂停

![1737809-20190808194132335-1849113154.png][]

7、使dd if=/dev/zero of=/root/file2 bs=1M count=1024 命令操作在后台运行

![1737809-20190808194137324-169472981.png][]

8、查看后台的任务列表

![1737809-20190808194142132-754297935.png][]

9、恢复dd if=/dev/zero of=/root/file bs=1M count=8190 让其在后台继续运行

![1737809-20190808194147128-602684698.png][]

10、查询dd if=/dev/zero of=/root/file bs=1M count=8190 命令的进程并通过kill杀死

![1737809-20190808194152799-75619414.png][]

11、设置一次性计划任务在18：00时关闭系统，并查看任务信息

![1737809-20190808194157408-431223151.png][]

12、以root身份设置周期性计划任务

a) 每天晚上的24点时打包压缩 /etc/passwd /etc/shadow /etc/group /etc/gshadow 为 file.tar.gz

![1737809-20190808194204002-1160189833.png][]

b) 每周一的每隔五分钟列出磁盘使用状况

![1737809-20190808194208977-1158908391.png][]

c) 每天的8:30与互联网时间同步服务器pool.ntp.org同步时间

![1737809-20190808194215942-512676327.png][]

13、通过crontab命令查看root的计划任务，通过文件查看类工具列出/var/spool/cron下对应的文件内容

![1737809-20190808194220497-1501785185.png][]

转载于:https://www.cnblogs.com/laohantui/p/11323369.html

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