Any UNIX command to defragment?

Hello Apple Discussions Community.
I would like to know if there is, same as "fsck -fy" to repair the HD, any UNIX command on Verbose Mode to optimize or defragment the Hard Drive. Thanks.

Limnos wrote:
OSX doesn't come with a defragment utility.
That is not entirely correct.
OS X continuously and automatically defragments files under 20MB. If you have many files larger than that, you can use a utility such as iDefrag. However, many say that the best and fastest way to defragment a large volume of large files is to back up, erase volume, restore volume. This is definitely a lot easier and faster than running a defragmentation utility. Possibly safer too, as extended defragmentation sessions can really hammer your hard disk heads.
Also, you may want to read this article that describes why the obsession with defragmentation in other file systems doesn't always apply to OS X, because of the efficient way OS X writes to disk in the first place. That combined with OS X auto-defragmentation means there is a lot less reason to defrag in OS X.
It mentions the sheer folly of running a defrag utility for several hours in order to speed up disk access time by a few seconds total. So, you saved how much time?

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Any unix commands to view network status & activity using the terminal?

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- Mark
G4/450MHz Sawtooth Mac OS X (10.4.7)

Hi Mark,
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sudo lsof +Mi
That will display all network connections and all listening daemons. A command that is similar to that is:
netstat -a -f inet
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~~~~
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Vara

Hi,
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MESSAGE D_MSG_TEXT.
IF SY-SUBRC NE 0.
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LOOP AT INT_table.
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ENDLOOP.
* Closing the File
CLOSE DATASET FILENAME.
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Best Regards,
Kush Kashyap

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logger.info(line);
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2. If no one is the owner, then where will the output of "at" command will go?
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regards
Nandha Kumar.M

filestream I have to ask - what's a chav ?
I have doubts abut what it is :-)
Seriously though, what is that an abbreviation for?
That's a new one to me.
http://www.chavscum.co.uk
chavs are roughly analogous to rednecksI wouldn't use that analogy. While both may lack certain social graces, rednecks typically don't receive ASBOs.
Chavs favor small cars with lots of bling whereas rednecks are likely to drive a pickup or a large sedan.
Chavs have pitbulls in their yards (gardens), rednecks an '84 Mustang LX on cinder blocks.
etc, etc.
Message was edited by:
filestream
Message was edited by:
filestream

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try something like this:
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cd /project3/tmt/;ls *.dmp > dmplist.lst
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Hi nahlikh,
Thank you for the reply.
I used below command in Procedure but still getting the same error as "java.io.IOException: Cannot run program "OdiOSCommand": error=2, No such file or directory".
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URGENT!! problems with Unix command, please help

I am trying to use the following Unix command and I keep getting error messaages from stdError. However if I run the same command from the command line it works perfectly. For some reason when I run the command from inside the program it thinks the append symbol ">>" is another file.
String command = " cat /users/02/wjoc1/Test/list.mod >> /users/02/wjoc1/Test/Blacklist ";
Process p = Runtime.getRuntime().exec(command);
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Hi,
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osascript
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Having trouble in running a unix command and getting the output

Hi,
I am trying to run a unix command from within the java code. I am not able to make it work. I am enclosing the code and the error message that I am getting. Any help is highly appreciated.
import java.io.*;
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}The error message that I am getting is
Here is the standard output of the command:
SLu|%%$$=
Here is the standard error of the command (if any):
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cat: cannot open -dLooks like the cat command is working and not the pipe command and the command after the pipe. But when I run the UNIX command from the command prompt I get the expected result.

You might read this article and see if its approach works.
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

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Hi Brian
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Unix Command run successfully through PL/SQL but showing no impact in UNIX.

Hi,
I am using Oracle 9i and Unix on my system and trying to execute a UNIX shell command through external procedure in C.
I created a shared lib (libextproc.so) for the following function.
int sysrun(char *command)
return system(command);
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create or replace library shell_lib as '/home/ECETRAonsite/oracle/OraHome1/lib/libextproc.so';
create or replace function sysrun (syscomm in varchar2)
return binary_integer
as language C
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library shell_lib
parameters(syscomm string);
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SQL>
1 declare
2 rc number;
3 begin
4 rc := sysrun('/bin/touch /home/ECETRAonsite/oracle/OraHome1/test/sach');
5 dbms_output.put_line('Return Code='||rc);
6* end;
SQL> /
Return Code=0
PL/SQL procedure successfully completed.
I have verified that the path for 'touch' is correct.
Following are my configuration files.
listener.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST =172.21.161.69 )(PORT = 1521)(KEY = ECTPRF))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = extproc2)
(ORACLE_HOME = /home/ECETRAonsite/oracle/OraHome1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ANY")
(SID_DESC =
(SID_NAME = ECTPRF)
(ORACLE_HOME = /home/ECETRAonsite/oracle/OraHome1)
(ENVS = "EXTPROC_DLLS=ANY")
tnsnames.ora
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = extproc2)
Please suggest what is lacking for this to work properly.
Thanks,

No need to create a C wrapper for that kernel call. Simply call the kernel SYSTEM() call direct.
The following works using 10.2.0.1 on HP-UX.
SQL> create or replace library libc as 'libc.2';
2 /
Library created.
SQL>
SQL>
SQL> create or replace function system( command IN string ) return binary_integer is
2 EXTERNAL
3 LIBRARY libc
4 NAME "system"
5 LANGUAGE C
6 CALLING STANDARD C
7 PARAMETERS (
8 command STRING
9 );
10 /
Function created.
SQL> show errors
No errors.
SQL>
SQL>
SQL> -- remove the test file
SQL> ! rm /tmp/plsql-test
SQL>
SQL> declare
2 rc integer;
3 begin
4 rc := system( '/usr/bin/touch /tmp/plsql-test' );
5 DBMS_OUTPUT.put_line( 'return code='||rc );
6 end;
7 /
return code=0
PL/SQL procedure successfully completed.
SQL>
SQL>
SQL>
SQL> -- display the test file
SQL> ! ls -l /tmp/plsql-test
-rw-r----- 1 oracle dba 0 May 17 14:36 /tmp/plsql-test
SQL>
You may need to define a different library on yours. The kernel shared lib is suppose to be libc.sl - for a reason I cannot recall anymore, I've changed it to use libc.2.
Oh yeah - the system call will be without any environment. Thus you cannot rely on any standard shell environment variables like PATH - you need to fully qualify executables and files (i.e. include the path).

Send a Unix command through ARD that will change a OS X admin user to a standard user.

I would love to send a Unix command through ARD that will change a OS X admin user to a standard user. The only thing I found close is
sudo dscl . -delete /Groups/admin GroupMembership USERNAME
which does remove the user from the list of admins, but they are still listed as an admin in the user preference panel, and can still use their account to authenticate for admin privileges.

I'm not having any problems adding or removing users from the 'admin' group by using the syntax's
dscl . -delete /Groups/admin GroupMembership ARDusername
or
dscl . -append /Groups/admin GroupMembership ARDusername
What I'm saying is if a user is ticked as an Adminstrator in System Preferences and I run the
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By the way the '/' doesn't work in the syntax in ARD.
Thanks

Any UNIX command to defragment?

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