crontab -l (default settings ???)

czezz · 07-24-2008, 07:50 AM

After fresh install of Solaris 10 5/08, below entries in crontab may be found:

Code:

bash-3.00# crontab -l
#ident  "@(#)root       1.21    04/03/23 SMI"
#
# The root crontab should be used to perform accounting data collection.
#
#
10 3 * * * /usr/sbin/logadm
15 3 * * 0 /usr/lib/fs/nfs/nfsfind
30 3 * * * [ -x /usr/lib/gss/gsscred_clean ] && /usr/lib/gss/gsscred_clean
#10 3 * * * /usr/lib/krb5/kprop_script ___slave_kdcs___

I can understand 1st entry: its a log rotation.
But another entry is unknown: nfsfind at 3:15 every day.
What more, in syslog at this time I can see this:

Code:

Jul 24 03:15:00 SRV sendmail[10813]: [ID 702911 mail.crit] My unqualified host name (SRV) unknown; sleeping for retry
Jul 24 03:15:00 SRV sendmail[10808]: [ID 702911 mail.crit] My unqualified host name (SRV) unknown; sleeping for retry
Jul 24 03:15:00 SRV sendmail[10804]: [ID 702911 mail.crit] My unqualified host name (SRV) unknown; sleeping for retry
Jul 24 03:15:00 SRV sendmail[10814]: [ID 702911 mail.crit] My unqualified host name (SRV) unknown; sleeping for retry
Jul 24 03:15:00 SRV sendmail[10807]: [ID 702911 mail.crit] My unqualified host name (SRV) unknown; sleeping for retry
Jul 24 03:15:00 SRV sendmail[10806]: [ID 702911 mail.crit] My unqualified host name (SRV) unknown; sleeping for retry
Jul 24 03:16:00 SRV sendmail[10804]: [ID 702911 mail.alert] unable to qualify my own domain name (SRV) -- using short name
Jul 24 03:16:00 SRV sendmail[10814]: [ID 702911 mail.alert] unable to qualify my own domain name (SRV) -- using short name
Jul 24 03:16:00 SRV sendmail[10813]: [ID 702911 mail.alert] unable to qualify my own domain name (SRV) -- using short name
Jul 24 03:16:00 SRV sendmail[10807]: [ID 702911 mail.alert] unable to qualify my own domain name (SRV) -- using short name
Jul 24 03:16:00 SRV sendmail[10806]: [ID 702911 mail.alert] unable to qualify my own domain name (SRV) -- using short name
Jul 24 03:16:00 SRV sendmail[10808]: [ID 702911 mail.alert] unable to qualify my own domain name (SRV) -- using short name
Jul 24 03:16:00 SRV sendmail[10804]: [ID 801593 mail.info] m6O1G0ZD010804: from=usr1, size=367, class=0, nrcpts=1, msgid=<200807240116.m6O1G0ZD010804@SRV>, relay=usr1@localhost
Jul 24 03:16:00 SRV sendmail[10806]: [ID 801593 mail.info] m6O1G0gF010806: from=usr2, size=371, class=0, nrcpts=1, msgid=<200807240116.m6O1G0gF010806@SRV>, relay=usr2@localhost

Jul 24 03:16:00 SRV sendmail[10804]: [ID 801593 mail.info] m6O1G0ZD010804: to=usr1, ctladdr=usr1 (60006/401), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30367, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection refused by [127.0.0.1]
Jul 24 03:16:00 SRV sendmail[10806]: [ID 801593 mail.info] m6O1G0gF010806: to=usr2, ctladdr=usr2 (60004/401), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30371, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection refused by [127.0.0.1]
Jul 24 03:16:00 SRV sendmail[10813]: [ID 801593 mail.info] m6O1G0Et010813: to=ndr63, ctladdr=ndr63 (60011/401), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30371, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection refused by [127.0.0.1]

Jul 24 04:57:15 SRV sendmail[13357]: [ID 702911 mail.crit] My unqualified host name (SRV) unknown; sleeping for retry
Jul 24 04:58:15 SRV sendmail[13357]: [ID 702911 mail.alert] unable to qualify my own domain name (SRV) -- using short name
Jul 24 04:58:15 SRV sendmail[13357]: [ID 801593 mail.info] m6O2wFds013357: from=root, size=1118, class=0, nrcpts=1, msgid=<200807240258.m6O2wFds013357@SRV>, relay=root@localhost
Jul 24 04:58:15 SRV sendmail[13357]: [ID 801593 mail.info] m6O2wFds013357: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31118, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection refused by [127.0.0.1]

Note that SENDMAIL is disabled.
Is this entry connected with those errors in syslog ?
Can I hash it as I am not using any NFS ?

jlliagre · 07-24-2008, 10:23 AM

These messages are unrelated to nfsfind but to cron. If you aren't using NFS as a client, you can remove that cron job.

Cron is sending mail to root at 3:15 to tell something about that nfsfind job.

czezz · 07-24-2008, 01:43 PM

The problem is that script does not contain any single command that would execute sendmail.
Please take a look:

Code:

bash-3.00# cat /usr/lib/fs/nfs/nfsfind
#!/bin/sh
# Copyright (c) 1993 by Sun Microsystems, Inc.

#ident  "@(#)nfsfind.sh 1.7     00/07/17 SMI"
#
# Check shared NFS filesystems for .nfs* files that
# are more than a week old.
#
# These files are created by NFS clients when an open file
# is removed. To preserve some semblance of Unix semantics
# the client renames the file to a unique name so that the
# file appears to have been removed from the directory, but
# is still usable by the process that has the file open.

if [ ! -s /etc/dfs/sharetab ]; then exit ; fi

# Get all NFS filesystems exported with read-write permission.

DIRS=`/usr/bin/nawk '($3 != "nfs") { next }
        ($4 ~ /^rw$|^rw,|^rw=|,rw,|,rw=|,rw$/) { print $1; next }
        ($4 !~ /^ro$|^ro,|^ro=|,ro,|,ro=|,ro$/) { print $1 }' /etc/dfs/sharetab`

for dir in $DIRS
do
        find $dir -type f -name .nfs\* -mtime +7 -mount -exec rm -f {} \;
done

That is why I am wondering about those errors in syslog.

jlliagre · 07-24-2008, 03:20 PM

I'm afraid you didn't carefully read my previous reply.

It is not the nfsfind script but cron that try to send these mails.

czezz · 07-25-2008, 03:53 AM

OK, correct me if I am wrong:
everything what cron does is what is inside crontab. No sendmail there.

So where should I look for that sendmail execution ?

jlliagre · 07-25-2008, 04:35 AM

Quote:

Originally Posted by czezz

OK, correct me if I am wrong:

Okay, let's do that !

Quote:

everything what cron does is what is inside crontab.

I'm afraid you are wrong here. Cron does things by itself, like parsing the crontabs, running commands found there here and do something with their outputs, like sending mails to the users ...

Quote:

No sendmail there.

You are correct, no sendmail in the crontab.

Quote:

So where should I look for that sendmail execution ?

In the cron manual page.