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#!/bin/sh ilockfile = /tmp/lockfile_for_backup_script REMOTE='example.com' PORT=20 USER='foob' PASSWORD='mypassword' FTPLOG='/var/mylog' #check if lockfile exists, if it does, exit if [ -e $lockfile ] ; then exit 0 fi # ok lockfile doesnt exist, lets crate it touch $lockfile ftp -n $REMOTE $PORT <<_FTP>>$FTPLOG quote USER $USER quote PASS $PASSWORD bin cd /home/backups/ mput /home/file/bk* quit _FTP # ok, we are done, remove lockfile rm -f $lockfile