| 1 | .TH CRONTAB 1
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| 2 | .SH NAME
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| 3 | crontab \- User crontab manipulation
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| 4 | .SH SYNOPSIS
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| 5 | .B crontab \-c
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| 6 | .RI [ user ]
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| 7 | .I file
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| 8 | .br
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| 9 | .B crontab \-l
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| 10 | .RI [ user ]
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| 11 | .br
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| 12 | .B crontab \-r
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| 13 | .RI [ user ]
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| 14 | .br
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| 15 | .B crontab \-p
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| 16 | .SH DESCRIPTION
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| 17 | The
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| 18 | .B crontab
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| 19 | program allows users to manipulate their personal crontab files. These
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| 20 | files are hidden in
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| 21 | .BI /usr/spool/crontabs/ user
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| 22 | where
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| 23 | .I user
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| 24 | is the login name of a given user. The system daemon
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| 25 | .B cron
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| 26 | uses these crontabs, among others, to run tasks that are to be repeated at
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| 27 | regular intervals. See
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| 28 | .BR crontab (5)
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| 29 | on what a good crontab file should look like.
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| 30 | .PP
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| 31 | Only the superuser can specify a user name to manipulate the crontab of a
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| 32 | given user. Any other user can only touch their own crontab file.
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| 33 | .SH OPTIONS
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| 34 | .TP
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| 35 | \fB\-c\fR [\fIuser\fR] \fIfile\fR
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| 36 | Install
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| 37 | .I file
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| 38 | as the crontab file of
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| 39 | .IR user .
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| 40 | .TP
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| 41 | \fB\-l\fR [\fIuser\fR]
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| 42 | List the crontab file of
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| 43 | .I user
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| 44 | to standard output.
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| 45 | .TP
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| 46 | \fB\-r\fR [\fIuser\fR]
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| 47 | Remove the crontab file of
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| 48 | .IR user .
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| 49 | .TP
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| 50 | \fB\-p\fR
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| 51 | Tell cron to reload its tables. Useful for system administrators to signal
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| 52 | a change to any of the system crontab files. Changes made by the
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| 53 | .B crontab
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| 54 | program are signalled automatically. (Mnemonic: \-p = "ping".)
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| 55 | .SH FILES
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| 56 | .TP \w'/usr/spool/crontabs/user'u+5n
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| 57 | .BI /usr/spool/crontabs/ user
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| 58 | Per user personal crontab file.
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| 59 | .SH "SEE ALSO"
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| 60 | .BR crontab (5),
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| 61 | .BR cron (8).
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| 62 | .SH DIAGNOSTICS
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| 63 | .B Crontab
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| 64 | preparses a new crontab and only installs it if correct. All errors are
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| 65 | sent to standard error, messages about installing a new table and telling
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| 66 | .B cron
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| 67 | to reload are sent to standard output.
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| 68 | .SH BUGS
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| 69 | .B Crontab
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| 70 | misses a
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| 71 | .B \-e
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| 72 | option that other implementations of this command allow one to edit the
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| 73 | current crontab and install the result. Seems quite handy until you try to
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| 74 | install a new crontab from an automated script. That's why this command
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| 75 | has a
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| 76 | .B \-c
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| 77 | option that installs a prepared crontab file. Use
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| 78 | .PP
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| 79 | .RS
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| 80 | .nf
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| 81 | crontab \-l >/tmp/tab
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| 82 | ${EDITOR\-vi} /tmp/tab
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| 83 | crontab \-c /tmp/tab
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| 84 | .fi
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| 85 | .RE
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| 86 | .PP
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| 87 | to get the same effect as
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| 88 | .BR "crontab \-e" .
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| 89 | .SH AUTHOR
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| 90 | Kees J. Bot (kjb@cs.vu.nl)
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| 91 |
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| 92 | .\"
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| 93 | .\" $PchId: crontab.1,v 1.3 2000/07/17 18:51:04 philip Exp $
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