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You could write a script that asks and then executes /bin/crontab. Put this in the PATH before /bin (eg /usr/local/bin):

Script could be something like this as an example. You may not want to...

Obviously it does so :(

Once in Solaris there was a bug that a "crontab" command wiped the crontab, even if it was aborted with Control-C.
Sun fixed it soon.

BTW, I have some scripts that...

Looks like a little bug.
crontab filename should check that filename exists and is a regular file (not a directory, device node, or other special file).

Just crontab (without arguments) should...

I will show better
crontab -l
#no tasks, empty
echo '*/1 * * * * /usr/bin/notify-send "*******HELLO TO EVERYONE HERE ON OUR MOON******"' >my_file
crontab my_file
crontab -l
*/1 * * * *...

Hi
If in the current directory where you ran this command there was an empty file with the name 'ccs',
then you probably deleted all your tasks. Just create new ones and that's it.

There are many ways. Perhaps the best way, if not correct way is to use PAM. Most distro provided services are PAM enabled, and you can certainly create your own PAM enabled services as well.
...

$ cat sample.txt
AT 0001 000000000100000000000
BE 4 000000000000030000000
DE 0055 000004000000000000000
FR 0 000000000000000110000
CZ 003 ...

When I run RudiC's code with a file containing:
XXXXXXX XXXXX MM11111 ZM 0 000000000000000000000OREGON XXXXXXX HXN 001111 01010
and the parameters POS="48-51" and...

Is it possible you searched for 8 chars to be replaced by a 4 char zero padded string? Tryawk '
{split (POS, P, "-")
P[2]++
LEN = P[2] - P[1]
printf...

How aboutawk '{split (POS, P, "-"); P[2]++; printf "%s%04d%s\n", substr($0, 1, P[1]-1), substr($0, P[1], P[2]-P[1]), substr ($0, P[2])}' POS="7-10" file

$ cat data
AT 1 000000000100000000000
BE 4 000000000000030000000
DE 55 000004000000000000000
FR 0 000000000000000110000
CZ 3 000330000000050000000

$...

Maximum command line length (in Linux)

getconf ARG_MAX

How about { tr $'\n' ' ' < $1; echo; } | fold -w80 | while read ID; do ID=${ID// /,}; echo "update table_name set status='INACTIVE' where req_id in ($ID);" ; done
update table_name set...

I think the line length limitation has to do with parameters that are passed to the script and not what is in the script itself. You say there is a text file with arguments in a single column, so...

Hello,

the wait statement can be used for this. Call it after starting your background jobs without an argument to make your script wait until all of them are finished.