Is there any case or reason to use "more" unix command instead of "less". As far as I see "less" is "better" in all senses, so does it mean that "more" is a command which has no reason to be used when there's "less"?

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    There's also most, which may or may not be installed your local Linux machine. It includes a nice status bar and will decompress gzip'd files automatically. – new123456 Apr 4 '12 at 16:28

The more command is considerably older than the less command (1978 vs 1983ish). The less command was introduced as a 'backwards more' (because you could scroll up). The more command is part of the OS binaries with most modern unix/linux OSs, while less is maintained externally as an open source project.

I'll often use more on systems with the bare minimum OS installed because less isn't available or installed yet.

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    And back when "minimum" meant a one- or two-floppy rescue system, of course you used a plain more because it was smaller than less. – dmckee Apr 4 '12 at 14:37
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    I don't trust those newfangled 1983 commands – JoelFan Apr 4 '12 at 16:52
  • I just looked at what less was linked against on my linux system, and saw libpcre, so I guess less also has fancier searching methods too. – jsbillings Apr 4 '12 at 19:32

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