$ echo -e "23561|783242|4823948.423847|47828374\n159,5|15|19.6\n253f|fjdk|fd32"| \
sed -r 's/^([0-9]+([,.][0-9]+){0,1}\|)+[0-9]+([,.][0-9]+){0,1}$/hi__&__bye/'
hi__23561|783242|4823948.423847|47828374__bye
hi__159,5|15|19.6__bye
253f|fjdk|fd32
while :
do
ssh -R localhost:2222:localhost:22 root@myhost
done
{ ftp -inv SERVER << EOF
user USER PASSWORD
cd DIRECTORY
ls -R
bye
EOF
} | sed '/^[d-]/!d;s/^\(.\).*/\1/' | sort | uniq -c | sed 's/-/files/;s/d/directories/'
echo -e "111\n222\n111\n333\n123" | uniq -d
echo -e "111\n222\n111\n333\n123" | sort | uniq -d
ssh -CND user@remote.host -R 80:127.0.0.1:apache_port