y proxy server password has special characters such as !,@, and so on. How do I set and export the variable called http_proxy or HTTP_PROXY when password has special characters under Unix like operating systems?
I noticed that many shell scripts in /etc/init.d/ directory use the following syntax:
echo $“Usage $prog start|stop|reload|restart”
Why a double-quoted string preceded by a dollar sign ($”string”) using the echo command under Linux / UNIX bash scripts?