grep

Search file for keyword Error:
```
$ grep "Error" mylogfile.log
```
Search file for keyword Error with case-insensitivity
```
$ grep -i "error" mylogfile.log
```

Searching several words in file

$ grep -Ei "error|exception|fatal" mylogfile.log

See more after and more before keyword in file:
```
$ grep -A 10 -B 20 "exception" mylogfile.log
```
Usage: Above grep will show 10 line after and 20 line before exception word in mylogfile.log
Search file and line with filename:
```
$ grep -nrH MyMethodName *
```
Usage: Above grep command will search files in current directory recursively with line and filename.
Search keyword in file and print only filename:
```
$ grep -ril <keyword> <location>
```
Usage: grep -ril "*myword*"
Find keyword in file and print filename only
```
grep -l "word" *
```

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