What is `^M` and how do I get rid of it? - Unix Linux Stack Exchange The ^M is a carriage-return character If you see this, you're probably looking at a file that originated in the DOS Windows world, where an end-of-line is marked by a carriage return newline pair, whereas in the Unix world, end-of-line is marked by a single newline
What is the difference between -m conntrack --ctstate and -m state --state Obsolete extensions: • -m state: replaced by -m conntrack Data point #2 Even so I found this SF Q A titled: Firewall questions about state and policy? where the OP claimed to have asked this question on IRC in #iptables@freenode After discussing it there he came to the conclusion that:
How to check OS and version using a Linux command @Ray, get the same for CentOS 7, issue net for Red Hat case is used to identify the format of print out message \r for "Inset the release number", \m for "insert the architecture identifier of the machine" –