bash : grep for pattern from certain location in the file
Using dd, the file can be sliced and then grep can be applied for the pattern on that slice.
Category: Unix Admin
snmp : find network information of a system centrally
Using snmpwalk on interface table (1.3.6.1.2.1.4.20.1.1 and 1.3.6.1.2.1.4.20.1.3) one can retrieve network information of a system centrally.
php : find if IP address is in Network range
Using pear Net_IPv4 one can find if a given IP address is in provided Network range or on the subnet.
perl : find if IP address is in Network range
Using NetAddr::IP one can find if a given IP address is in provided Network range or on the subnet.
bash : search multiple file patterns using single find command
Using a combination of patterns with "-o" and/or -"a" (which OR the pattern or AND the pattern) in find command, one can search for various patterns or combine ...
VirtualBox : Use Raw Disk to load Windows under Linux
Using VBoxManage and install-mbr commands, one can use raw disk with a virtual machine under VirtualBox. Here I discuss how to load a partition that has Windows...
Howto rollover a file when size exceeds using unix find
Using -size and -exec flags of find command, one can easily find when the logfile has grown above the threshold and move it to another name in one shot.
ubuntu : How to Install LAMP (Linux, Apache, MySQL, PHP suite)
tasksel install lamp-server is one liner to install the full suite of applications on already running debian based Linux system.
bash : Self redirect of Script’s output to a file
Using shell builtin exec, ouput and error output streams of a script can be redirected just like ">" or ">>" operators.
cron : List users who have cron jobs scheduled
For each user who has cron jobs scheduled on a system, one file exists in /var/spool/cron directory. So a simple listing of this directory will provide who has ...