9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I keep getting this error when i run my script:
No matter how many times i run this rm -rf /siebel/sfs/tmp/dump it succeeds when i expect it only the first time to succeed becoz i expect the second to fail as the directory should be gone in the first run.
i had earlier mentioned... (5 Replies)
Discussion started by: mohtashims
5 Replies
2. Shell Programming and Scripting
Hello,
I was trying to identify lines who has a word of the following pattern "xyyx" (where x, and ys are different characters).
I was trying the following grep -
egrep '(\S)()\2\1'
This pattern do catches the wanted pattern, but it also catches "GGGG" or "CCCC" patterns. I was trying to... (5 Replies)
Discussion started by: itskov
5 Replies
3. HP-UX
Hi all,
I am using HP-UX and I have just noticed that when I log into the network it seems to save the previous windows that were subsequently closed on previous occasions. Does anyone know when I log in, it seems to display these previous windows, e.g. nedit windows open again?
Does... (1 Reply)
Discussion started by: cyberfrog
1 Replies
4. Shell Programming and Scripting
Hi All,
I got a strange problem here. I have a perl script which is fetching data from a database table and writing a file with that data.
If i run that script from linux command line, the file it creates is a normal ascii text file without any binary character in it.But... (9 Replies)
Discussion started by: DILEEP410
9 Replies
5. Shell Programming and Scripting
Hi all,
I want to do a very simple thing with sed. I want to print out the line number of a disk I have defined in /etc/exports, so I do:
It's all good, but here's the problem. When I define md0 in a variable, I get nothing from sed:
Why is that? can anybody please help?
Thanks (2 Replies)
Discussion started by: alirezan
2 Replies
6. UNIX for Dummies Questions & Answers
Had a strange thing going on with my code. It's ok I figured it out for myself.... (2 Replies)
Discussion started by: mrpugster
2 Replies
7. UNIX for Advanced & Expert Users
$ echo a.bc | sed -e "s/\|/\\|/g"
|a|.|b|c|
$
Is the behavior of the sed statement expected ? Or is this a bug in sed ?
OS details
Linux 2.6.9-55.0.0.0.2.ELsmp #1 SMP Wed May 2 14:59:56 PDT 2007 i686 i686 i386 GNU/Linux (8 Replies)
Discussion started by: vino
8 Replies
8. Shell Programming and Scripting
Can some-one give me a view to this :
I have a directory in an unix server, having permissions r-xr-xr-x .This directory is basically a source directory.
Now there is another directory basically the destination directory which has all the permissions.
Note:I log in as not the owner,but user... (5 Replies)
Discussion started by: navojit dutta
5 Replies
9. Linux
Hi there,
first of all, here is my conf of a uname -a
Linux SAMBA 2.4.18-4GB #1 Wed Mar 27 13:57:05 UTC 2002 i686 unknown
on a fedora machine.
Here is my problem: every once in a while, the line containing root disappears in the /etc/passwd, disabling all logging on my server. Any one have... (0 Replies)
Discussion started by: penguin-friend
0 Replies
smtpdcheck(1) Mail Avenger 0.8.3 smtpdcheck(1)
NAME
smtpdcheck - check SMTP servers
SYNOPSIS
smtpdcheck [--stop {ip-addr|name}] [--timeout seconds]
[prio:]server [[prio:]server]
DESCRIPTION
smtpdcheck checks to see if SMTP servers are available. The intent is for use on secondary mail servers, which have no reason to accept
mail when the primary server is available.
The argument consists of a list of server names, each of which may optionally be prefixed by a numeric MX priority and a colon. (This is
exactly the format for MX records returned by the avenger dns command.) smtpdcheck will attempt to connect to each server in succession.
If one of the servers specified on the command line is available, smtpdcheck will print its name to standard output and exit with status 1.
If smtpdcheck cannot connect to any of the servers, it will exit with status 0. If a system error occurs, smtpdcheck will exit with status
2.
OPTIONS
--stop {ip-addr|name}
Tells smtpdcheck to stop before checking a server with IP address ip-addr or hostname name. If such a host is encountered in the list
of servers and prio is specified, then smtpdcheck will consider it acceptable for other servers with the same priority to be available,
even if those servers were first in the list. In other words, given the following arguments:
smtpdcheck --stop s2.domain.com
10:s1.domain.com 10:s2.domain.com
20:s3.domain.com
This command will always succeed, regardless of whether "s1.domain.com" is up, because "s2.domain.com" has the same priority. On the
other hand, the following command will fail and output "s1.domain.com" if "s1.domain.com" is up:
smtpdcheck --stop s2.domain.com
10:s1.domain.com 20:s2.domain.com
30:s3.domain.com
If a gethostbyname lookup for the argument name fails, smtpdcheck will exit immediately with status 2.
--timeout {seconds]
By default, smtpdcheck spends 10 seconds probing each server. This includes the time to do a DNS lookup, to establish a TCP connection
to port 25 of the server, and to read the "220" SMTP code from the server's SMTP greeting message. To use a different value, specify
it with the --timeout option. The value 0 disables the timeout completely, which is dangerous since smtpdcheck might then end up
waiting forever to read the "220" string.
EXAMPLES
To refuse to relay mail at a secondary MX server when the primary server is not down, you might place the following in
/etc/avenger/secondary (assuming MxLocalRcpt is 1):
dns RECIP_MXES mx "$RECIPIENT_HOST"
setvars
server=`smtpdcheck --stop $MYIP $RECIP_MXES`
test -n "$server" && defer "Please use server $server"
SEE ALSO
avenger(1) dbutil(1) asmtpd.conf(5),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
smtpdcheck could achieve much lower latency by probing all the servers simultaneously. It should also include some kind of caching, to
avoid repeatedly trying to contact an unavailable server. Finally, hosts with multiple IP addresses could be handled more cleanly, though
what smtpdcheck does should probably work in most cases.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 smtpdcheck(1)