Several useful Linux commands: nl, join, cut, csplit ... NL: plus line number EG: LS | NL JOINT: Put two files according to a given field (field) Links CUT: Deleting the specified fields in a row CSPLIT: Remove the specified row in a file to make a character EG: banner -ca hello with letters A constitute a Hello word OD: Use binary to display the file content SEQ: Sequence produces a set of numbers (1, 3, 5, 7, ...) EG: SEQ 2 2 10 Generate 2, 4, 6, 8, 10 ASCII: Display ASCII Table Sort: Sort Uniq: Remove the same Row WATCH: Cycling Run Specified command EG: Watch -n 3 -d PS U WANGWEI Run "PS U Wangwei" every 3 seconds, while displaying two different places with anti-white SED: stream editor tee: The data COPY in Stdin has a copy, and the data is transmitted to stdout zip, unzip: zip data tar: Pack multiple files Diff, patch: file comparison, patch tool See: http://www.linuxforum.net/ Forum / GSHOWFLAT.PHP? CAT = & Board = Linuxk & number = 316135 & Page = 0 & view = collapsed & sb = 1 & o = all & fpart =