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Files & Text

How to search inside files with grep in Linux

Search file contents with grep: recursive, case-insensitive, line numbers, whole words, regex, and surrounding context.

Create, list, and extract tar archives with gzip compression, and extract safely by listing contents first.

Find files by name, type, modification time, and size with find, and quickly by name with locate.

View files with cat, less, head, and tail, including following a growing log with tail -f and -F.

Replace text in a stream or file with sed, preview before editing, and edit in place safely with a backup.

Extract columns, filter rows, and compute sums with awk, including a custom field separator.

Sort lines, remove or count duplicates, and count lines, words, and bytes with sort, uniq, and wc.

Extract fields with cut, translate or delete characters with tr, and join files side by side with paste.

Compare two files line by line with diff, find common lines with comm, and check if files are identical with cmp.