reverse grep to discover values from one list that are not in another list

Sample Input Lists

[user@server]# cat list-full      [user@server]# cat list-partial
1                                 1
2
3                                 3
4
5                                 5
6
7                                 7
8
9                                 9
10

Sample output

[user@server]# ./list-diff.sh
2
4
6
8
10
[user@server]# ./list-match.sh
1
3
5
7
9

---

list-match.sh

#!/bin/bash
# this will compare two lists and output the lines that appear in both
for i in `cat list-partial`
    do if  grep -q -v $i list-full
        then echo $i
       else
        true
      fi
    done

list-diff.sh

#!/bin/bash
#this will compare two lists and output the lines that appear in the list-full only

for i in `cat list-full`
    do if grep -q $i list-partial
        then true
        else echo $i
       fi
    done

Example application

You have 2 list a list containing all your servers and another list of the servers with a software package installed.

for i in `cat systems_list_2014-02-20-sorted` 
  do
    if grep -q  $i package_listinstalledsystems_example-1.2.3-4.x86_6-sorted 
      then true 
      else echo $i 
    fi 
done > systems_without__example-1.2.3-4.x86_6