In addition to the many stat()s you do many fork()s.
Each call to external programs like ls, awk, hostname, basename, dirname is a fork().
The following has the number of fork's reduced:
This User Gave Thanks to MadeInGermany For This Post:
Running open solaris on a e420 that I recently picked up. Having issues sshing to it from either of my Linux boxes as its very slow to login (from the solaris box to the linux box it connects just fine.
Here is the output of ssh -vvv. I have hightlighted where it seems the slowdown is. Does... (0 Replies)
i'm not much of an advanced unix programmer but I'm trying to write a script to access files on box1 after ssh from box 1 to box2. when ssh is invoked in the script i'm getting logged into box2 and losing complete touch with box1 which is normal i guess.
but my main aim with my script is when i... (3 Replies)
Hi !
Can somebody tell me why -or- when will a unix box will become slow in processing ....
where to go and chk the stats... for this ???
Pls help..
Thanks in advance... (2 Replies)
Dear World,
I just wrote a script, which puzzled me somewhat. The siginficant code was:
for file in `ls splits*`; # splits* came from a split command executed earlier
do
tail -$SomeNumber $file | cut -d" " -f6 > $file;
done;
The interesting thing is this: A few of the $files were... (2 Replies)
Basically my requirement is to know the total number of free anonymous ports.
anonymous port range is 32768- 65535.
i wrote a script for that
**********************************************
for i in {32768..65535}
do
netstat -an | grep $i > /dev/null
if
... (21 Replies)
My git post-update has the following lines in it to make sure the permissions are set right:
find /usr/local/apache/htdocs -type d -print0 | xargs -0 chmod 755
find /usr/local/apache/htdocs -type f -print0 | xargs -0 chmod 644
chown -R apache:apache /usr/local/apache/htdocsThe only problem is... (5 Replies)
I have to list the files in a directory and along with that, list the owner of each of those files. Can someone please help me with a way to get this info please?
Gayathri (2 Replies)
Gents,
Please can u help me to improve this script to be more faster, it works perfectly but for big files take a lot time to end the job..
I see the problem is in the step (while) and in this part the script takes a lot time..
Please if you can find a best way to do will be great.
... (13 Replies)
Discussion started by: jiam912
13 Replies
LEARN ABOUT OSX
chown
CHOWN(8) BSD System Manager's Manual CHOWN(8)NAME
chown -- change file owner and group
SYNOPSIS
chown [-fhv] [-R [-H | -L | -P]] owner[:group] file ...
chown [-fhv] [-R [-H | -L | -P]] :group file ...
DESCRIPTION
The chown utility changes the user ID and/or the group ID of the specified files. Symbolic links named by arguments are silently left
unchanged unless -h is used.
The options are as follows:
-f Don't report any failure to change file owner or group, nor modify the exit status to reflect such failures.
-H If the -R option is specified, symbolic links on the command line are followed. (Symbolic links encountered in the tree traversal
are not followed.)
-h If the file is a symbolic link, change the user ID and/or the group ID of the link itself.
-L If the -R option is specified, all symbolic links are followed.
-P If the -R option is specified, no symbolic links are followed. Instead, the user and/or group ID of the link itself are modified.
This is the default. Use -h to change the user ID and/or the group of symbolic links.
-R Change the user ID and/or the group ID for the file hierarchies rooted in the files instead of just the files themselves.
-v Cause chown to be verbose, showing files as the owner is modified.
The -H, -L and -P options are ignored unless the -R option is specified. In addition, these options override each other and the command's
actions are determined by the last one specified.
The owner and group operands are both optional; however, at least one must be specified. If the group operand is specified, it must be pre-
ceded by a colon (``:'') character.
The owner may be either a numeric user ID or a user name. If a user name is also a numeric user ID, the operand is used as a user name. The
group may be either a numeric group ID or a group name. If a group name is also a numeric group ID, the operand is used as a group name.
For obvious security reasons, the ownership of a file may only be altered by a super-user. Similarly, only a member of a group can change a
file's group ID to that group.
DIAGNOSTICS
The chown utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
Previous versions of the chown utility used the dot (``.'') character to distinguish the group name. This has been changed to be a colon
(``:'') character, so that user and group names may contain the dot character.
On previous versions of this system, symbolic links did not have owners.
The -v option is non-standard and its use in scripts is not recommended.
LEGACY DESCRIPTION
In legacy mode, the -R and -RP options do not change the user ID or the group ID of symbolic links.
SEE ALSO chgrp(1), find(1), chown(2), fts(3), compat(5), symlink(7)STANDARDS
The chown utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compliant.
HISTORY
A chown utility appeared in Version 1 AT&T UNIX.
BSD March 31, 1994 BSD