08-08-2001
You mean 'file descriptors' (FDs) I think. The total number of FDs are kernel parameters. Depending on what UNIX flavor you are running, the kernel documentation and souce code has this info. Some systems are easier than other to reconfigure.
Also, there are formulas to change these parameters because raising or lowering one key kernel parameter effects others (like a balance or scale.... commonly referred to as a design trade-off.)
So, as you know, you can't just make this parameter 100000000000 without seriously impacting (in a negative way) your system performance.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi all
I try to execute SSH commands on several hosts in a while-loop.
There seems to be a problem with file-handle, first cycle works correct but no other one will follow due to the while condition is false even that there are many more host entries (lines) in all_hosts.dat.
... (3 Replies)
Discussion started by: DaveCutler
3 Replies
2. Shell Programming and Scripting
Hello,
I have a program which opens a pipe for communication using file handle and forks 5 child processes.
@waitlist = (1,2,3,4,5);
foreach $item (@waitlist) {
pipe *{$item},RETHAND;
unless ($pid = fork()) {
# Child process
print RETHAND... (1 Reply)
Discussion started by: the_learner
1 Replies
3. Shell Programming and Scripting
See attached file that includes code, input and output.
I am processing a colon delimited input file and building a ":" (colon) delimited output file.
My printf statement prints contents of each of 20 variables and puts them into a record file. I am pushing out approximately 120 records.
The... (2 Replies)
Discussion started by: Skyybugg
2 Replies
4. Shell Programming and Scripting
We have a process that is running out of file handles. Is there some command line way to determine this that we can include into a cron script?
Please let me know
JAK (3 Replies)
Discussion started by: jakSun8
3 Replies
5. UNIX for Advanced & Expert Users
Hi Thinkers,
On AIX 5.3, we have a monitor program that reads the log file and searching for a certain string pattern that we define(say "transactionException"), if it sees it then it will raise an alert by sending an email.
Because the log file XXX.log is rolling into XXX.log.0, XXX.log.1,... (2 Replies)
Discussion started by: TheGunMan
2 Replies
6. UNIX for Advanced & Expert Users
I'm using Sendmail 8.13.8 on a CentOS 5.5 vServer (Virtuozzo).
I'm using a loop in PHP to send a lot of HTML-mails via sendmail. Each mail is a mail with individual statistics for our users, so its not mass mailing, bcc is not an option.
It all works fine, but when I take a closer look there... (2 Replies)
Discussion started by: ZX81
2 Replies
7. UNIX for Dummies Questions & Answers
This is a strange one.
We have an issue where our system is leaking SCTP file handles. There are people working on this and in the mean time we have a monitoring script that alarms when we need to perform actions to manually clear them. For testing purposes I want to write a script that... (0 Replies)
Discussion started by: RECrerar
0 Replies
8. Shell Programming and Scripting
Hi Friends,
I'm a great fan of this forum... it has helped me tone my skills in shell scripting. I have a challenge here, which I'm sure you guys would help me in achieving...
File A has a list of job ids and I need to compare this with the File B (*.log) and File C (extend *.log) and copy... (6 Replies)
Discussion started by: asnandhakumar
6 Replies
9. Linux
Hi everyone, I have a question about the process management, and deep level system functionality of system calls between SystemD and SystemV? Does SystemD use the same system calls (fork(), exec(), bind() etc...) as SystemV? or Vice Versa? If they both use the same or very very similar sys... (2 Replies)
Discussion started by: Lost in Cyberia
2 Replies
10. Shell Programming and Scripting
Shell script logic
Hi
I have 2 input files like with file 1 content as (file1)
"BRGTEST-242" a.txt "BRGTEST-240" a.txt "BRGTEST-219" e.txt
File 2 contents as fle(2)
"BRGTEST-244" a.txt "BRGTEST-244" b.txt "BRGTEST-231" c.txt "BRGTEST-231" d.txt "BRGTEST-221" e.txt
I want to get... (22 Replies)
Discussion started by: pottic
22 Replies
LEARN ABOUT LINUX
debconf-set-selections
DEBCONF-SET-SELECTIONS(1) Debconf DEBCONF-SET-SELECTIONS(1)
NAME
debconf-set-selections - insert new default values into the debconf database
SYNOPSIS
debconf-set-selections file
debconf-get-selections | ssh newhost debconf-set-selections
DESCRIPTION
debconf-set-selections can be used to pre-seed the debconf database with answers, or to change answers in the database. Each question will
be marked as seen to prevent debconf from asking the question interactively.
Reads from a file if a filename is given, otherwise from stdin.
WARNING
Only use this command to seed debconf values for packages that will be or are installed. Otherwise you can end up with values in the
database for uninstalled packages that will not go away, or with worse problems involving shared values. It is recommended that this only
be used to seed the database if the originating machine has an identical install.
DATA FORMAT
The data is a series of lines. Lines beginning with a # character are comments. Blank lines are ignored. All other lines set the value of
one question, and should contain four values, each separated by one character of whitespace. The first value is the name of the package
that owns the question. The second is the name of the question, the third value is the type of this question, and the fourth value (through
the end of the line) is the value to use for the answer of the question.
Alternatively, the third value can be "seen"; then the preseed line only controls whether the question is marked as seen in debconf's
database. Note that preseeding a question's value defaults to marking that question as seen, so to override the default value without
marking a question seen, you need two lines.
Lines can be continued to the next line by ending them with a "" character.
EXAMPLES
# Force debconf priority to critical.
debconf debconf/priority select critical
# Override default frontend to readline, but allow user to select.
debconf debconf/frontend select readline
debconf debconf/frontend seen false
OPTIONS
--verbose, -v
verbose output
--checkonly, -c
only check the input file format, do not save changes to database
SEE ALSO
debconf-get-selections(1) (available in the debconf-utils package)
AUTHOR
Petter Reinholdtsen <pere@hungry.com>
2011-06-22 DEBCONF-SET-SELECTIONS(1)