Linux Notes

From Simson Garfinkel
Revision as of 03:48, 20 January 2014 by Simson (talk | contribs)
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Some notes on Linux, perhaps quite old

Initial Setup


To install Fedora from the Live User:

  • Application->System Tools->Install to Hard Drive

To enable remote access:

  • Fedora now defaults to firewall on so you probably need to run:

It may not be installed so need to yum install system-config-firewall. There is another firewall tool used by default, but it isn't yet feature complete so I still use system-config-firewall. Then allow port 22.

Also be sure that sshd is started/enabled:

   systemctl enable sshd.service
   systemctl start sshd.service

Find current Linux Version


   cat  /etc/lsb-release

Updating, Upgrading and Installing

Update Fedora

 sudo yum update        # downloads and installs out-of-date RPMs
 sudo yum list installed # shows what is installed
 sudo yum list                # shows all packages available.

Update Ubuntu

 sudo apt-get update    # updates the databases
 sudo apt-get upgrade   # downloads and installs the .apt files

Upgrade Ubuntu

  1. See
  2. In System->Administration->Update Manager, click on "Settings" and chose the set of releases you wish.

Network Upgrade for Ubuntu Servers

   sudo apt-get install update-manager-core
   sudo do-release-upgrade

Ignoring TCP Reset


   ipfw add 1000 drop tcp from any to me tcpflags rst in


   iptables -I FORWARD -p tcp --tcp-flags RST RST -j DROP