Page 157 - DCAP602_NETWORK_OPERATING_SYSTEMS_I

Unit 8: Shell

httpd -l : Lists compiled in Apache modules notes
httpd status : Only works if mod_status is enabled and shows a page of active connections service
httpd restart : Restarted Apache web server

Did u know? What are the top commands is excellent for managing your system
processes?



Caselet of commands and Batch files

need some information about commands in batch file. I mentioned in batch file as @at
time:10:15:11.35p “c:\data\byt.” But the command is not run in the specified time. The
I batch file extension is byt, which is the batchfile I mentioned with path in batch file.
Please tell me what the Schedule service is. How do I use the `AT’ `at’ command to use at
command in a batch file? My system runs on: Windows NT 2000. Please suggest a solution
with an example.
m.D. anwar
“AT” is a command line utility used for scheduling tasks. It uses the same “Task Scheduler”
service used by the widows scheduler in the control panel. You need to have this service
running to have the “AT” command working. Please check out some information on the
same by going to the “Services” icon in the control panel.
A correction to the above command is that you should remove the “time” parameter form
the command line and just give the command as “at 10:15 c:\data\byt.bat”. Since this
command runs as a background process you can include “{circ}{gt} c:\output.txt” to the
command line so that you can see what has actually happened, so you command will now
look like this: “at 10:15 c:\data\byt.bat {circ}{gt} c:\output.txt “.
There is one more command utility which you can use to schedule tasks, it is the schtasks.
exe. It has all the functionality of “AT” and more. The scheduler in the control panel and
schtasks.exe are one and at the same. In other words, using schtasks.exe you can handle the
windows scheduler form the command prompt itself.
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8.3 summary

Computers understand the language of zeros and ones known as binary language. In the early
days of computing, instructions were provided using binary language, which is difficult for all
of us humans to read and write. Bash is a free software UNIX shell written for the GNU Project.
Its name is an acronym which stands for Bourne-again shell. The C shell (csh) is a Unix shell
developed by Bill Joy for the BSD Unix system. The Korn shell (ksh) is a Unix shell which was
developed by David Korn (AT&T Bell Laboratories) in the early 1980s. TCSH is an enhanced but
completely compatible version of the Berkeley UNIX C shell.

8.4 keywords

C shell: The C shell (csh) is a Unix shell developed by Bill Joy for the BSD Unix system.
Korn shell: The Korn shell (ksh) is a Unix shell which was developed by David Korn (AT&T Bell
Laboratories) in the early 1980s.

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