‘base64’ transforms data read from a file, or standard input, into (or from) base64 encoded form. The base64 encoded form uses printable ASCII characters to represent binary data. Synopses: base64 [OPTION]… [FILE] base64 –decode [OPTION]… [FILE] The base64 encoding expands data to roughly 133%...
‘cat’ copies each FILE (‘-‘ means standard input), or standard input if none are given, to standard output. Synopsis: cat [OPTION] [FILE]… The program accepts the following options. ‘-A’ | ‘–show-all’ Equivalent to ‘-vET’. ‘-b’ | ‘–number-nonblank’ Number all nonempty output lines, starting with 1....
‘cksum’ computes a cyclic redundancy check (CRC) checksum for each given FILE, or standard input if none are given or for a FILE of ‘-‘. Synopsis: cksum [OPTION]… [FILE]…
‘csplit’ creates zero or more output files containing sections of INPUT (standard input if INPUT is ‘-‘). Synopsis: csplit [OPTION]… INPUT PATTERN… The contents of the output files are determined by the PATTERN arguments as detailed below. An error occurs if a PATTERN argument refers...
by Ramdev · Published September 30, 2015 · Last modified September 29, 2015
‘fmt’ fills and joins lines to produce output lines of (at most) a given number of characters (75 by default). Synopsis: fmt [OPTION]… [FILE]… ‘fmt’ reads from the specified FILE arguments (or standard input if none are given), and writes to standard output. ...
‘fold’ writes each FILE (‘-‘ means standard input), or standard input if none are given, to standard output, breaking long lines. Synopsis: fold [OPTION]… [FILE]… By default, ‘fold’ breaks lines wider than 80 columns. The output is split into as many lines as necessary. ‘fold’...
‘head’ prints the first part (10 lines by default) of each FILE; it reads from standard input if no files are given or when given a FILE of ‘-‘. Synopsis: head [OPTION]… [FILE]… If more than one FILE is specified, ‘head’ prints a one-line header...
‘md5sum’ computes a 128-bit checksum (or “fingerprint” or “message-digest”) for each specified FILE. Note: The MD5 digest is more reliable than a simple CRC (provided by the ‘cksum’ command) for detecting accidental file corruption, as the chances of accidentally having two files with identical MD5 are...
‘nl’ writes each FILE (‘-‘ means standard input), or standard input if none are given, to standard output, with line numbers added to some or all of the lines. Synopsis: nl [OPTION]… [FILE]… ‘nl’ decomposes its input into (logical) pages; by default, the line number is...
by Ramdev · Published September 30, 2015 · Last modified September 29, 2015
‘numfmt’ reads numbers in various representations and reformats them as requested. The most common usage is converting numbers to/from _human_representation (e.g. ‘4G’ ==> ‘4,000,000,000’). numfmt [OPTION]… [NUMBER] ‘numfmt’ converts each NUMBER on the command-line according to the specified options (see below). If no NUMBERs...
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