sed is one of the most important editors we use in UNIX. It supports lot of file editing tasks. In this article, we will see a specific set of sed options.
Assume I have a flat file, empFile, containing employee name and employee id as shown below:
Positional parameters in a shell script are nothing but the command line arguments passed to a shell script. The following are some of the positional parameters used:
$# - Total number of arguments
$0 - Command or the script name
$1,$2, $3 - First, second and third args respectively.
$* - All the command line arguments starting from $1.
