Tuesday, December 3, 2013

System Management Commands in Linux

Linux System Management Commands

The following commands are mostly we are using in the Linux system , So i am here mentioning the important thing what we are using our daily usage in Linux system management commands.

System Management Commands in Linux

Runtime level management
  1. exit Terminates the shell.
  2. halt Stop the system.
  3. init Process control initialization. (init 3)
  4. logout Log the user off the system.
  5. poweroff Brings the system down.
  6. reboot Reboot the system.
  7. runlevel List the current and previous runlevel.
  8. shutdown If your system has many users, use the command shutdown -h +time ‘<message>`, where time is the time in minutes until the system is halted, and message is a short explanation of why the system is shutting down.                                                               Ex: # shutdown -h +10 'We will install a new disk. System should be back on-line in three hours.‘
  9. passwd Set a user's pass word. (passwd, passwd <username>)
  10. quota Display users' limits and current disk usage. (quota, quota <username>)
  11. quotaoff Turns filesystem quotas off.
  12. quotaon Turns filesystem quotas on.
  13. quotacheck Used to check a filesystem for usage, and update the quota.user file.
  14. edquota Used to edit user or group quotas. (edquota <username>).
  15. su Single user login. (su -)
  16. useradd Create a new user or update default new user information. (useradd –g <group> -s <shell> -c <comment> –d <home directory> <username>
  17. userdel Delete a user account and related files. (userdel <user name>)
  18. usermod Modify a user account.
  19. users Print the user names of users currently logged in.
  20. wall Send a message to everybody's terminal. (wall “text message”)
  21. who Display the users logged in.
  22. whoami Print effective user id.                              
    System Time
  23. cal Calendar. (cal, cal 2005)
  24. date Print or set the system date and time. (date, date MMDDhhmm[[CC]YY][.ss]) 
  25. hwclock Set or read the hardware CMOS clock.
  26. uptime Reports how long the system has been running.

System Management Commands in Linux

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