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Readline search in bash. Ctrl-r: revers …

Readline search in bash.
Ctrl-r: reverse search
Ctrl-s: forward search
However, the Ctrl-s keybinding is conflict with a settingin Ubuntu.
Disable it with this command and Ctrl-s will be working.

$ stty -ixon

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When the forward search of readline is n …

When the forward search of readline is not working.

$ stty -a
$ stty -ixon