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perl -ne 'print if /pattern1/ xor /pattern2/'

awk 'xor(/pattern1/,/pattern2/)'

awk '/pattern1/+/pattern2/==1`

perl -ne 'print if /pattern1/ xor /pattern2/'

awk 'xor(/pattern1/,/pattern2/)'

awk '/pattern1/+/pattern2/==1`

perl -ne 'print if /pattern1/ xor /pattern2/'

awk 'xor(/pattern1/,/pattern2/)'

awk '/pattern1/+/pattern2/==1`

perl -ne 'print if /pattern1/ xor /pattern2/'

awk 'xor(/pattern1/,/pattern2/)'

awk '/pattern1/+/pattern2/==1`

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egrep  'pattern1|pattern2' file | grep -v -e 'pattern1.*pattern2' -e 'pattern2.*pattern1'

egrep  'pattern1|pattern2' file | grep -v -e 'pattern1.*pattern2' -e 'pattern2.*pattern1'

egrep  'pattern1|pattern2' file | grep -v -e 'pattern1.*pattern2' -e 'pattern2.*pattern1'

egrep  'pattern1|pattern2' file | grep -v -e 'pattern1.*pattern2' -e 'pattern2.*pattern1'

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$ cat testfile.txt

abc

def

abc def

abc 123 def

1234

5678

1234 def abc

def abc



$ grep -w -e 'abc' -e 'def' testfile.txt | grep -v -e 'abc.*def' -e 'def.*abc'

abc

def

$ cat testfile.txt

abc

def

abc def

abc 123 def

1234

5678

1234 def abc

def abc



$ grep -w -e 'abc' -e 'def' testfile.txt | grep -v -e 'abc.*def' -e 'def.*abc'

abc

def

$ cat testfile.txt

abc

def

abc def

abc 123 def

1234

5678

1234 def abc

def abc



$ grep -w -e 'abc' -e 'def' testfile.txt | grep -v -e 'abc.*def' -e 'def.*abc'

abc

def

$ cat testfile.txt

abc

def

abc def

abc 123 def

1234

5678

1234 def abc

def abc



$ grep -w -e 'abc' -e 'def' testfile.txt | grep -v -e 'abc.*def' -e 'def.*abc'

abc

def

add a comment | 

$ cat << EOF > foo

> a b

> a

> b

> c a

> c b

> b a

> b c

> EOF

$ grep -w 'a' foo | grep -vw 'b'; grep -w 'b' foo | grep -vw 'a';

a

c a

b

c b

b c

$ cat << EOF > foo

> a b

> a

> b

> c a

> c b

> b a

> b c

> EOF

$ grep -w 'a' foo | grep -vw 'b'; grep -w 'b' foo | grep -vw 'a';

a

c a

b

c b

b c

$ cat << EOF > foo

> a b

> a

> b

> c a

> c b

> b a

> b c

> EOF

$ grep -w 'a' foo | grep -vw 'b'; grep -w 'b' foo | grep -vw 'a';

a

c a

b

c b

b c

$ cat << EOF > foo

> a b

> a

> b

> c a

> c b

> b a

> b c

> EOF

$ grep -w 'a' foo | grep -vw 'b'; grep -w 'b' foo | grep -vw 'a';

a

c a

b

c b

b c