First off - ALL comands in a cron entry or in a cron script should have explicit paths to command files. The PATH is not the same as you have at the command line.
who am i can be implemented all kinds of ways, as an alias or some other feature of the who command. It is usually this:
where "am and "i" are arguments.
You need to experiment with each simple element of your command in crontab entry - enter the command let it run, remove it from crontab, then check the log or email.
example
wait a minute, remove the crontab entry and then read the logfile. Proceed iteratively.
Is there some reason not to use the shell variable $USER?
Hi all ,
When i am tryting to execute crontab from home directory for a shell script which is located in some directory it is giving a error message
The crontab file is
0 9-17 * * 1-5 /mydir/myshell
The following output is given
Your "cron" job
/mydir/myshell
produced the following... (1 Reply)
Hi,
Just need some help in this.
Suppose there is one file a.txt, which contains this data:
"25187","00000022","00",28-MAR-2007,"" ,"D",-000001550,+0000000000,"C", ,+000000000,+000000000,000000000,"2","" ,29-MAR-2007
613TB.STEXTRF1
"25187","0000004H","00",29-MAR-2007,""... (3 Replies)
I'm having a problem getting my variables to work in dishing out an RMC script.
The $1 works fine. $2 does not
Here's a portion of the script:
server=$1
filesystem1=$2
#
dsh -w $1 'mkcondition -c "/var space used" -s "Name == \"$2\"" -e "PercentTotUsed > 90" -d "An event will be generated... (7 Replies)
Can anyone please help me on this.
i have a file with lines say
X X3200 X
X X
X2400 X X4100
I want to use sed to put the numbers in braces.
the output should be like,
X X(3200) X
X X
X(2400) X X(4100) (7 Replies)
I know this script is crummy, but I was just messing around.. how do I get sed's insert command to allow variable expansion to show the filename?
#!/bin/bash
filename=`echo $0`
/usr/bin/sed '/#include/ {
i\
the filename is `$filename`
}' $1
exit 0 (8 Replies)
Hey, guys!
Trying to research this is such a pain since the read command itself is a common word. Try searching "unix OR linux read command examples" or using the command substitution keyword. :eek:
So, I wanted to use a command statement similar to the following.
This is kinda taken... (2 Replies)
Hello again,
I'm trying to change the following line:
INSERT INTO PH1_TX_LOAD VALUES ('TX-78731-AABSS:4182-4','RH: GUIDE TO TENNIS',TO_DATE('18-JUN-2001:00:00:00', 'DD-MON-YYYY:HH24:MI:SS'),TO_DATE('21-JUN-2001:00:00:00', 'DD-MON-YYYY:HH24:MI:SS'),500)
so that any TO_DATE is taken... (6 Replies)
Hi,
The user "MadeInGermany" tried to help on the below post by saying "This has been asked before; see the links below.
Get your current LD_LIBRARY_PATH and redefine that in your ksh script!
"
Thanks for the help. but this did not help. And my post got locked. I can't reply on my previous... (5 Replies)
HI
i was studying about variable substitution. below are info which was given in a online tutorial.
${parameter:-word}---> If parameter is null or unset, word is substituted for parameter.
The value of parameter does not change.
${parameter:=word}---> If parameter is null or... (3 Replies)
Discussion started by: scriptor
3 Replies
LEARN ABOUT PHP
cron
cron(1M) System Administration Commands cron(1M)NAME
cron - clock daemon
SYNOPSIS
/usr/sbin/cron
DESCRIPTION
cron starts a process that executes commands at specified dates and times.
You can specify regularly scheduled commands to cron according to instructions found in crontab files in the directory
/var/spool/cron/crontabs. Users can submit their own crontab file using the crontab(1) command. Commands which are to be executed only once
can be submitted using the at(1) command.
cron only examines crontab or at command files during its own process initialization phase and when the crontab or at command is run. This
reduces the overhead of checking for new or changed files at regularly scheduled intervals.
As cron never exits, it should be executed only once. This is done routinely by way of the svc:/system/cron:default service. The file
/etc/cron.d/FIFO file is used as a lock file to prevent the execution of more than one instance of cron.
cron captures the output of the job's stdout and stderr streams, and, if it is not empty, mails the output to the user. If the job does not
produce output, no mail is sent to the user. An exception is if the job is an at(1) job and the -m option was specified when the job was
submitted.
cron and at jobs are not executed if your account is locked. Jobs and processses execute. The shadow(4) file defines which accounts are not
locked and will have their jobs and processes executed.
Setting cron Jobs Across Timezones
The timezone of the cron daemon sets the system-wide timezone for cron entries. This, in turn, is by set by default system-wide using
/etc/default/init.
If some form of daylight savings or summer/winter time is in effect, then jobs scheduled during the switchover period could be executed
once, twice, or not at all.
Setting cron Defaults
To keep a log of all actions taken by cron, you must specify CRONLOG=YES in the /etc/default/cron file. If you specify CRONLOG=NO, no log-
ging is done. Keeping the log is a user configurable option since cron usually creates huge log files.
You can specify the PATH for user cron jobs by using PATH= in /etc/default/cron. You can set the PATH for root cron jobs using SUPATH= in
/etc/default/cron. Carefully consider the security implications of setting PATH and SUPATH.
Example /etc/default/cron file:
CRONLOG=YES
PATH=/usr/bin:/usr/ucb:
This example enables logging and sets the default PATH used by non-root jobs to /usr/bin:/usr/ucb:. Root jobs continue to use
/usr/sbin:/usr/bin.
The cron log file is periodically rotated by logadm(1M).
FILES
/etc/cron.d Main cron directory
/etc/cron.d/FIFO Lock file
/etc/default/cron cron default settings file
/var/cron/log cron history information
/var/spool/cron Spool area
/etc/cron.d/queuedefs Queue description file for at, batch, and cron
/etc/logadm.conf Configuration file for logadm
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO svcs(1), at(1), crontab(1), sh(1), logadm(1M), svcadm(1M), queuedefs(4), shadow(4), attributes(5), smf(5)NOTES
The cron service is managed by the service management facility, smf(5), under the service identifier:
svc:/system/cron:default
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
DIAGNOSTICS
A history of all actions taken by cron is stored in /var/cron/log and possibly in /var/cron/olog.
SunOS 5.10 5 Aug 2004 cron(1M)