UNIX for Dummies Questions & Answers

idxxx1   something   something   marker_id_132=rsxxx;marker_id_135=rsxxx   
idxxx2   something   something   marker_id_132=rsxxx;marker_id_135=rsxxx   
idxxx3   something   something   marker_id_132=rsxxx;marker_id_135=rsxxx   
...

idxxx1   marker_id_132=rsxxx
idxxx3   marker_id_132=rsxxx

egrep "idxx1|idxx3" file.txt

#!/bin/bash

while read line
do
        l="${line##* }"

        [[ "$line" =~ ^idxxx1 ]] && printf "%s %s\n" "idxxx1" "${l%;*}"
        [[ "$line" =~ ^idxxx3 ]] && printf "%s %s\n" "idxxx3" "${l%;*}"

done < filename

#!/bin/bash
while read key other
do
 l=${other##* }
 case $key in
 idxxx1|idxxx3) printf "%s %s\n" "$key" "${l%%;*}"
 ;;
 esac
done < data_set

#!/bin/sh
awk '$1~/^(idxxx1|idxxx3)$/ { split($NF,a,";"); printf "%s %s\n", $1, a[1] }
' data_set

$ egrep "idxxx1|idxxx3" file
$ idxxx1   something   something   marker_id_132=rsxxx;marker_id_135=rsxxx
   idxxx3   something   something   marker_id_132=rsxxx;marker_id_135=rsxxx

$ egrep "idxxx1|idxxx3" file | awk '{print $1 "\t" $4}' 
$ idxxx1  marker_id_132=rsxxx;marker_id_135=rsxxx
   idxxx3  marker_id_132=rsxxx;marker_id_135=rsxxx

$ egrep "idxxx1|idxxx3" file | awk '{print $4}' | awk -F';' '{print $1}'
$ idxxx1  marker_id_132=rsxxx
   idxxx3  marker_id_132=rsxxx

str="idxxx1|idxxx3"; egrep $str file | awk '{print $1 "\t" $4}' | awk -F';' '{print $1}'

egrep "idxxx1|idxxx3" file | tr ";tab" "  "|tr -s " "|cut -f1,4 -d" "

awk '/^idxxx1/||/^idxxx3/{$0=$1" "$NF;sub(/;.*/,x); print}' file