GREP OR: Match Any Of Multiple Patterns

GREP OR: Match Any Of Multiple Patterns-Find all the lines of a file, that match any of provided patterns.

We can use grep and egrep commands:

Syntex:

grep "PATTERN1\|PATTERN2" FILE
grep -E "PATTERN1|PATTERN2" FILE
grep -e PATTERN1 -e PATTERN2 FILE
egrep "PATTERN1|PATTERN2" FILE

Lets see it with the help of examples one by one:

I will use a log file to demonstrate above command:

abc.log is having pattern as below:

———————————————————————————————–suman……………..22222………………….cbhvfvbbmbdidufg
techsarthi……………..1111………………………
khozbikar………………………33333……………………

1. Grep command with single search pattern:

Command:  grep 1111 abc.log

output: techsarthi……………..1111………………………(it will print the line having search pattern)

2.Grep command with multiple search pattern:

Command: grep “1111\|2222” abc.log

output: (above command will print all the lines having pattern 1111 or 2222)

suman……………..22222………………….cbhvfvbbmbdidufg
techsarthi……………..1111………………………

3. Grep command with multiple search pattern:

Command:  grep -E “1111|2222” abc.log

output:  (above command will print all the lines having pattern 1111 or 2222)

suman……………..22222………………….cbhvfvbbmbdidufg
techsarthi……………..1111………………………

4.Grep command with multiple search pattern:

Command:  grep -e 1111 -e 2222 abc.log

output:  (above command will print all the lines having pattern 1111 or 2222)

suman……………..22222………………….cbhvfvbbmbdidufg
techsarthi……………..1111………………………

5. egrep command with multiple search pattern:

Command: egrep “1111|2222” abc.log

output:  (above command will print all the lines having pattern 1111 or 2222)

suman……………..22222………………….cbhvfvbbmbdidufg
techsarthi……………..1111………………………

6.Grep command with multiple search pattern:

Command:  grep -E “1111|2222|3333” abc.log

output:  (above command will print all the lines having pattern 1111 or 2222 or 3333)

suman……………..22222………………….cbhvfvbbmbdidufg
techsarthi……………..1111………………………
khozbikar………………………33333……………………