UNIX问题：

1. Q. How do you find out the processes that are currently running or a particular user?

A. ps -au Myname   (-u by effective user ID (supports names)) (a - all users)

2. Q. How do you kill a process?

A. kill -9  8 (process_id 8) or kill -9  %7  (job number 7)

kill -9 -1  (Kill all processes you can kill.)

killall - kill processes by name most (useful - killall java)

3. Q. What would you use to view contents of a large error log file?

A. tail  -10 file_name   ( last 10 rows)

4.Q. How do you list contents of a directory including all of its

subdirectories, providing full details and sorted by modification time?

A. ls -lac

-a all entries

-c by time

5.Q. How do you create a symbolic link to a file (give some reasons of doing so)?

A. ln /../file1 Link_name

Hard Link, soft Link?

6.Q. How do you check the sizes of all users锟?home directories (one command)?

A. du -s

df

7.Q. How do you check for processes started by user 'pat'?

A. ps -fu pat   (-f -full_format u -user_name )

8.Q. How do you start a job on background?

A. bg  %4  (job 4)

9. Q. How to remove directory with files?

A. rm -rf directory_name

10. Q. How can you see all mounted drives?

A. mount -l

11. Q. How can you find a path to the file in the system?

A. locate file_name (locate - list files in databases that match a pattern)

12. Q. What Linux  HotKeys do you know?

A. Ctrl-Alt-F1 Exit to command prompt

Ctrl-Alt-F7 or F8    Takes you back to KDE desktop from command prompt

Crtl-Alt-Backspace Restart XWindows

Ctrl-Alt-D Show desktop

13. Q. If you would like to run two commands in sequence what operators you can use?

A. ; or && the difference is:

if you separate commands with ; second command will be run automatically.

if you separate commands with && second command will be run only in the case

the first was run successfully.

14.  Question: How to switch to a previously used directory?

Answer:  cd -