grep

Pattern matching engine.

grep [options] "pattern" [file or directory]

File/directory : Where grep needs to search. Searches in current directory if not provided.

• -r recursive search (within all subdirectories)
• -i ignore case
• -n show line numbers with match
• -v show lines that do not match
• -l list file names with match
• -c count lines with match for each file
• --color=auto highlight matched text
• --include="*.js" include only the files matching the pattern

References

• GNU Grep 3.12