Shell usage record

Check/set system services

  chkconfig 

Display Process dynamics

Top. Common performance analysis tools in inux can display the resource usage of various processes in the system in real time, similar to the Windows Task Manager.

Detailed explanation of http://blog.csdn.net/sanshiqiduer/article/details/1933625

Text Search grep

http://www.cnblogs.com/end/archive/2012/02/21/2360965.html

Task
Use shell commands to control job execution
Jobs: list processes belonging to the current user
BG [% N] move the process to background)
FG [% N] move the process to the foreground for running (foreground)
Transfer the job to the background for running
Add & after executing the command, for example, $:./A. Out &
For the program being executed, use Ctrl + Z to suspend the program, and then press the BG command.
Crontab scheduled task execution
http://blog.csdn.net/tianlesoftware/article/details/5315039
Ifconfig displays or sets the network device http://linux.chinaitlab.com/command/723693.html
AnotherNetstatCommand to display more network statuses. Http://linux.chinaitlab.com/command/723699.html. Tcpdump Installation Package Manager. Rpm $:Rpm-Qa RSH// Check whether RSH has been installed