Changes

| -e || Specify multiple search patterns || grep -e 'root' -e 'system' /etc/passwd

| -e || Specify multiple search patterns || grep -e 'root' -e 'system' /etc/passwd

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| -r || Recursive || Example

| -r || Recursive ||  

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| -v || Show lines not matching the pattern || Example

| -v || Show lines not matching the pattern ||  

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| -i || Case insensitive || Example

| -i || Case insensitive ||  

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| -n || Output line numbering || Example

| -n || Output line numbering ||

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| -E || Enable regex use (similar to egrep) || Example

| -E || Enable regex use (similar to egrep) ||  

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| -o || Show only the match, not the full line || Example

| -o || Show only the match, not the full line ||  

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| -f FILE || Example || Example

| -f FILE || Example ||

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| -H || Print file name || Example

| -H || Print file name ||  

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