4 FAQ tagged "system_v"

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How to: Disable firewall on RHEL / CemtOS / Redhat Linux
Q. I don’t want firewall because I only run one http (port 80) public service. How do I turn off or disable firewall permanently under RHEL?
A. iptables is administration tool / command for IPv4 packet filtering and NAT.
service is a command to run a System V init script. It is use to [...]
Linux / UNIX: Find out or determine if process pid is running
Q. How do I find out my process is running? How do I get pid number for particular process?
A. The easiest way to find out is run ps aux command and grep process name. If you got output along with process name/pid, your process is running.
Task: Find out process pid
Simply use ps command as follows:
ps [...]
update-rc.d like command on Redhat Enterprise / CentOS Linux
I’m using Debian Linux for last 4 years. I’m not able to find out update-rc.d like command ( install and remove System-V style init script links) on Redhat enterprise Linux (RHEL 5). Can you specify equivalent command for the same task?
Debian or Ubuntu Linux runlevel configuration tool to start service
Q. Under Red Hat or Cent OS chkconfig command provides a simple command-line tool for maintaining the /etc/rc[0-6].d directory hierarchy by relieving system administrators of the task of directly manipulating the numerous symbolic links in those directories. How do I control (or maintain Ubuntu runlevel) startup service under Debian or Ubuntu Linux with command [...]

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