User: useradd, userdel, usermod, passwd, groupadd, talk, write, ID, WHO, whoami, users
File Permission: chown, chmod, touch (file modification date), FTP,
File Processing: Find, grep, WC, ln
Disk: DF (hard disk capacity), du (hard disk usage ).
Firewall: ifconfig, netstart (route), iptable, chkconfig
Default System Configuration: date, Cal
Process: PS, kill
Remote Logon: talnet, mailx, mesg
Service:
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At last, I still cannot figure it out by default when I start the system. I will have a chance to see how to figure it out later.
Pay attention to and strengthen the following points: Hard Disk mounting, regular expressions, wildcards, Shell, Python, startup process and startup services and files, file system backup and restoration, Vim, use of Emacs.
For more details, follow this URL:
Http://blog.csdn.net/wojiaopanpan/article/details/7286430
Command Learning (continue learning supplement)