03-01-2013
Quote:
Originally Posted by
sakurashinken
besides the process, process id and owner, I have no idea what these things are. Could someone explain?
Probably shared-memory segments or temporary files. It is hard to tell without the output surrounding it.
Quote:
Originally Posted by
sakurashinken
Also, what is /dev/random?
A device which produces a (pseudo-)random sequence of numbers, one every time you query it. For some things in UNIX one needs a random generator (for instance: the retransmission time offset if an Ethernet packet collides with another).
Random bits of "noise" is collected systemwide (i.e. from device drivers) in an "entropy pool". From this pool very high-quality random numbers are generated, but "/dev/random" will stop once the entropy pool is depleted until it is refilled. In most systems there is also a "/dev/urandom", which is will not block in this case, but produce "less random" (the numbers are more predictable).
I hope this helps.
bakunin
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I have a number of open files connecting to the rpcbind process running on HPUX 11.00. Usinf lsof -p rpcbind I am unable to identify the ip addresses of the open files. Example of one below - Any ideas?
rpcbind 19754 root 100u inet 72,0x72 0t0 TCP 79.60.53.40:* (BOUND) (2 Replies)
Discussion started by: Malcolmm
2 Replies
2. Filesystems, Disks and Memory
Could someone please give me a step for a hint on which version and where is the above utility is for version 4.3.3.0
of Aix. (1 Reply)
Discussion started by: jacl
1 Replies
3. UNIX for Dummies Questions & Answers
what does this line of output signify from the lsof output:
java 1419 root 7u sock 0,0 2170 can't identify protocol
Thanks (2 Replies)
Discussion started by: skotapal
2 Replies
4. UNIX for Dummies Questions & Answers
Hi All,
I'm having a problem with "lsof" in HP-UX system. Its giving me 2 two different results when running it.
1 . lsof -p 'PID' | wc -l -----gives some value
2 . lsof | grep 'PID' | wc -l
The above two commands gives me two different values with the same PID......
Thanks (6 Replies)
Discussion started by: marc
6 Replies
5. UNIX for Dummies Questions & Answers
When I execute lsof command to some process IDs I am getting the the following output.
lsof +p 27672
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 27672 alttool cwd vx_inode: wrong ino size
Why it is displaying 'vx_inode: wrong... (3 Replies)
Discussion started by: balajilinks
3 Replies
6. HP-UX
I need lsof equivalent in HP-UX. I do not want to add lsof utility separately. (1 Reply)
Discussion started by: deo_kaustubh
1 Replies
7. UNIX for Dummies Questions & Answers
I'm looking to list all of the files open at a certain time up on a UNIX box.
From looking on the internet, it looks as though lsof is the most common.
However have tried this and got the following:
ksh: lsof: not found
Now having gone into bash mode and hit tab twice I see that lsof... (3 Replies)
Discussion started by: meevagh
3 Replies
8. UNIX for Dummies Questions & Answers
Hi,
I typed lsof -i :80 in my putty but i am not able to get sockets related to port 80
Can any one help me out soon
Can anyone point out the reason for not able to get the related sockets
Output of what i am getting in my putty is displayed below
training@use:~> lsof -i :80... (4 Replies)
Discussion started by: satheeshkr_cse
4 Replies
9. HP-UX
In Linux and Solaris lsof accepts the -X switch which allows to see if deleted files are still in use and eat disk space. In HP-UX it is now working and it is a problem... today one of my filesystems on the server was increasing very fast but existing file sizes were not really changing. lsof shows... (3 Replies)
Discussion started by: Vorb
3 Replies
10. Shell Programming and Scripting
Hi,
I am trying to find the files in a specific directory that are currently in open state. I need this information to archive the old files that are not active in the directory.
I get the following output when I try the command $ lsof +d '/var/tmp/'|awk '{print $9}'|sort -u
NAME... (1 Reply)
Discussion started by: ryzen7
1 Replies
LEARN ABOUT DEBIAN
lfc-chown
LFC-CHOWN(1) LFC User Commands LFC-CHOWN(1)
NAME
lfc-chown - change owner and group of a LFC directory/file in the name server
SYNOPSIS
lfc-chown [-h] [-R] owner[:group] path...
lfc-chown [-h] [-R] :group path...
DESCRIPTION
lfc-chown sets the owner and/or the group of a LFC directory/file in the name server to the values in owner and group respectively.
To change the owner ID, if the group ID does not change and if the caller and the new owner ID belong to that group, GRP_ADMIN privilege is
needed, otherwise the caller must have ADMIN privilege in the Cupv database. To change the group ID, the effective user ID of the process
must match the owner ID of the file and the new group must be in the list of groups the caller belong to or the caller must have ADMIN
privilege in the Cupv database.
owner is either a valid username or a valid numeric ID.
group is either a valid group name or a valid numeric ID.
path specifies the LFC pathname. If path does not start with /, it is prefixed by the content of the LFC_HOME environment variable.
OPTIONS
The following options are supported:
-h If path is a symbolic link, changes the ownership of the link itself.
-R Recursive mode.
EXIT STATUS
This program returns 0 if the operation was successful or >0 if the operation failed.
SEE ALSO
Castor_limits(4), lfc_chown(3), Cupvlist(1)
AUTHOR
LCG Grid Deployment Team
LFC
$Date: 2007/01/15 08:05:17 $ LFC-CHOWN(1)