Samarthya

• Bash is a string oriented language
• We do not write step=$((step++)) this expression will return a numeric value which the shell will then take as the command to to be executed.
• No spaces are allowed around the equal sign for variable assignment.
• let "step++" is same as (( step++ ))
• Use declare to set variable values and attributes

In bash = and == both mean the same thing

awk provides filtering capabilities

> printf 'gate\napple\nwhat\nkite\n' | awk '/at/'

gate
what

printf 'gate\napple\nwhat\nkite\n' | awk '!/e/'

what

awk is primarily used for field based processing

One liner structure awk 'cond1{action1} cond2{action2} … condN{actionN}'