File Text Manipulation
grep | Find lines in a file that match a regular expression. |
cut | Extract columns from a file. |
paste | Append columns. |
tr | Translate characters into other characters. |
sort | Sort lines of text by various criteria. |
uniq | Locate identical lines in a file. |
tee | Copy a file and print it on standard output, simultaneously. |
Commands are terrific for text manipulation: manipulating a text file (or standard input) into a desired form by applying transformations, often in a pipeline. Any program that reads standard input and writes standard output falls into this category, but here we’ll present some of the most important tools.
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