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Re:Show HN: McFly, a smart Bash history search CLI in Rust w... by 0db532a0 on Tuesday December 04, 2018 @06:58AM (#18598600)
This is actually a general feature of the GNU readline library, which a lot of programmes including bash use. For instance, a lot of REPLs like ghci use it.

https://linux.die.net/man/3/readline

https://tiswww.cwru.edu/php/chet/readline/rltop.html

Re:Show HN: McFly, a smart Bash history search CLI in Rust w... by majewsky on Tuesday December 04, 2018 @07:31AM (#18598806)
As does my favorite underappreciated Unix CLI tool, units(1).

  $ units --verbose
  You have: 1 mile * 20 pounds force
  You want: joule
          1 mile * 20 pounds force = 143174.38 joule
          1 mile * 20 pounds force = (1 / 6.98449e-06) joule
Re:Show HN: McFly, a smart Bash history search CLI in Rust w... by 0db532a0 on Tuesday December 04, 2018 @07:34AM (#18598819)
I had no idea of that command. Thanks.
Re:Show HN: McFly, a smart Bash history search CLI in Rust w... by JetSpiegel on Tuesday December 04, 2018 @08:11PM (#18604970)
For dumb terminals, you can also use rlwrap: https://linux.die.net/man/1/rlwrap