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Hi, can someone explain the differences between using the at and crontab commands. When would you use one command over the other?
Dom (1 Reply)
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I have a crontab entry,but it is not working.
Can anybody help me in this regard?? (2 Replies)
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jobs are scheduled in crontab . To view this I use crontab -l . But suddenly today I am not able to see any jobs that is being scheduled in crontab. when I type crontab -l , I am seeing nothing.I am not logging through admin user(i dont have it).But I can schedule jobs through... (3 Replies)
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I run a .sh file using crontab. I need to know the path of the file . Previously when I run the file alone , i used "pwd" but now when using crontab it gives the temp directory of the file.
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I've a shell script which calls a Sybase stored procedure to do some functionality. I want to schedule the running of this script by crontab. I'm using Solaris 5.8. When i executed the following command
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how to schedule the crontab file in unix? (2 Replies)
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7. Shell Programming and Scripting
i have a ksh script that creates messages in a temp directory and then sends them out using the sendmail command and i'm trying to set it up to run every night with crontab.
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How can I run "crontab" (parameters) every 6 hours on solaris machine?
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dear all ,
does any one now how can i become sure that the crontab that i put was working successfully not by looking for thr result of the sheduled task but from a log for the crontab or something similar
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00 15 * * 0,1,2,3,6... (2 Replies)
Discussion started by: habuzahra
10. UNIX for Dummies Questions & Answers
I have a shell script which works fine at the command line
and does works in crontab also but does not send the output to
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Discussion started by: run_time_error
cron(8) System Manager's Manual cron(8)
cron - The system clock daemon
The cron daemon runs shell commands at specified dates and times. Commands that are to run according to a regular or periodic schedule are
found within the crontab files. Commands that are to run once only are found within the at files. You submit crontab and at file entries
by using the crontab and at commands. Because the cron process exits only when killed or when the system stops, only one cron daemon
should exist on the system at any given time. Normally, you start the cron daemon from within a run command file.
During process initialization and when cron detects a change, it examines the crontab and at files. This strategy reduces the overhead of
checking for new or changed files at regularly scheduled intervals. The cron command creates a log of its activities. The cron daemon
must be started from the system startup scripts because it must begin execution without a login user ID set. The cron daemon starts each
job with the following process attributes stored with the job by the invoking process: Login user ID Effective and real user IDs Effective
and real group IDs Supplementary groups
It also establishes the following attributes from the authentication profile of the account associated with the login user ID of the invok-
ing process: Audit control and disposition masks Kernel authorizations
The at and batch programs will refuse to accept jobs submitted from processes whose login user ID is different from the real user ID.
Specifies the command path. Main cron directory Directory containing the crontab files. List of allowed users. List of denied users His-
tory information for cron Queue description file for at, batch, and cron
Commands: at(1), crontab(1), rc0(8), rc2(8), rc3(8)
Files: queuedefs(4) delim off