How do I cut characters from column 5 to 7 of the lines 3 onwards?
I am trying to use sed/cut.
For example, If I have
this is amazing1 this is amazing11
this is amazing2 this is amazing21
this is amazing3 this is amazing31
this is amazing4 this is amazing41
this is amazing5 this is amazing51
this is amazing6 this is amazing61
this is amazing7 this is amazing71
Output should look like:
this is amazing1 this is amazing11
this is amazing2 this is amazing21
this amazing3 this is amazing31
this amazing4 this is amazing41
this amazing5 this is amazing51
this amazing6 this is amazing61
this amazing7 this is amazing71
The characters is are removed from lines 3 and onwards.
I'd just use awk for clarity, portability, etc.:
$ awk 'NR>2{$0=substr($0,1,4) substr($0,8)} 1' file
this is amazing1 this is amazing11
this is amazing2 this is amazing21
this amazing3 this is amazing31
this amazing4 this is amazing41
this amazing5 this is amazing51
this amazing6 this is amazing61
this amazing7 this is amazing71
or using variables populated with the values from your question:
$ awk -v n=3 -v beg=5 -v end=7 'NR>=n{$0=substr($0,1,beg-1) substr($0,end+1)} 1' file
this is amazing1 this is amazing11
this is amazing2 this is amazing21
this amazing3 this is amazing31
this amazing4 this is amazing41
this amazing5 this is amazing51
this amazing6 this is amazing61
this amazing7 this is amazing71