Jeg måtte med å gjøre mens loopen logikken arbeider i skall-program når jeg er ny i skallet programmering
1) Jeg måtte prøve å hente fila fra den eksterne siden ---- må prøve 15 minutter fra hverandre for 4 ganger og avslutte programmet hvis filen ikke er tilgjengelig ....

Jeg måtte vite hvordan jeg kan setup tellere til å prøve på mens loop ......

som jeg har prøve på nedenfor. Please hjelp

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for file in $ FILES; do
ekko
echo "Om å Gjenerverve $ file from $ SOU $ SRDIR"
echo "via $ proxy"
ekko
err \u003d 1
mens [ "$ err"! \u003d 0]; do
ssh-x $ proxy ftp "$ SOU $ SRDIR $ file"
err \u003d $?
if [ "$ err"! \u003d 0]; deretter
echo "Filoverføring feilet. Bummer. $ err"
echo "Trying again in 15 minutes"
dvale 900
fi
ferdig
echo "Henter filen $ file ..."
scp-p $ proxy: ~ / $ file.
chmod 666 $ file
ls-l $ file
ssh-x $ proxy rm $ file
ferdig
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