Find Large Files in Linux

by | Linux

This doesn’t work perfectly, but I often use it to start tracking down disk hogs: To return the 10 largest items in a given directory: du -cksh * |sort -rn |head -11 Some times it’s helpful to view all du -cksh * |sort -rn If someone has a better approach,...

Find Failed Login Attempts in Logs

by | Linux, Uncategorized

Looking for a log to show you failed login attempts to your Linux machine? Look in: /var/log/btmp You can access it by running: /usr/bin/lastb It’s similiar to the wtmp log of user login/logouts and the utmp log showing who is currently logged...

Change Runtime Settings for Linux Servers

by | Linux

I install RHEL on all my production machines and CentOS on all my test/development boxes. Installing the GUI is helpful for configuration, but you sure don’t want to run them that way all the time. So after everything is installed, configured and tested, I make...

Add a Virtual IP Address in Linux

by | Linux, Uncategorized

nano /etc/sysconfig/network-scripts/ifcfg-eth0 Should look something like this DEVICE=eth0 BOOTPROTO=static BROADCAST=172.16.0.255 HWADDR=00:00:00:00:00:00 IPADDR=172.16.0.2 NETMASK=255.255.255.0 NETWORK=172.16.0.0 ONBOOT=yes Duplicate that and open the new file cp...