Category: Linux

Turn on IP forwarding in Linux IP. To turn forwarding on temporarily, use the following command as root: (this will be disabled after a reboot) echo “1” > /proc/sys/net/ipv4/ip_forward Or to make it permanent add the following to /etc/sysctl.conf net.ipv4.ip_forward = 1 In older versions of Redhat / CentOS you can edit /etc/sysconfig/network and enable […]

Label Linux partitions e2label device e2label /dev/sda1

Note: this article is quite dated now as there are easier ways to install spamassassin but if you want to install from source this will work. Installing Spamassassin Login as root and run a Perl shell (cpan I think) perl -MCPAN -e shell Then begin the installation: install Mail::SpamAssassin Install will commence and once complete, […]

Some distributions of Linux use a different default screen font, resulting in strange fonts when using MC in PuTTY. The following fixes this problem. Backup /etc/sysconfig/i18n – then clear the contents of the existing file and add the following lines: LANG=”en_GB.iso885915″ SUPPORTED=”en_GB.iso885915:en_GB:en:en_US.iso885915:en_US:en” SYSFONT=”lat0-sun16″ SYSFONTACM=”iso15″ Log out and back in again, and MC will now display […]

Change Unix file permissions recursively: To list: Note: use “iname” for a case insensitive operation find . -name “*.pls” -exec ls -ls {} \; To Change find . -name “*.pls” -exec chmod 750 {} \; (execute the chmod command for every file [named *.pls] found by find.) find . -type d -exec chmod 755 {} […]

Authenticated FTP with MC /#ftp:[!][user[:pass]@]machine[:port][remote-dir] cd /#user:pass@site

vi search and replace: (in command mode) The following strings illustrate how to perform a search and replace in the Unix vi editor. :g/old_text/s//new_text/g Replace EOL (end of line) :g/$/s//new_string/g where $ is EOL and \t = a tab The start of line can be equally easily searched and replaced – using the carat ^ […]

List users on Linux cat /etc/passwd | cut -d”:” -f1