Re: [PLUG] PLUG N 2015-12-08: QEMU, sshfs and readline

[JP Vossen <jp@jpsdomain.org>]

Good point, I should have mentioned CTRL-R, which is reverse command
history search that's there by default.  CTRL-R will search your history
in reverse order for the substring you enter, e.g., "^Rfile" will find
the most recent instance of the string "file".  The up arrow bind below
searches only the start of the string, so it will find "vi" but not
"paving".

I really like the up arrow behavior when I'm prototyping something
because I'm often running the same several commands and I find typing
the first 1-2 characters and up arrow is very fast and feels natural to
me.  YMMV.

On 12/09/2015 04:07 AM, PaulNM wrote:
> Hi JP,
> 
>     I'm wondering if those bind commands give you any advantage over
> ctrl-r history searching (aside from the neat case insensitive one). Or
> did you not know about ctrl-r when making them. :)
> 
> - PaulNM
> 
> 
> On 12/09/2015 03:12 AM, JP Vossen wrote:
>> Thanks to Keith for a very interesting QEMU P2V (physical 2 virtual)
>> talk!
>>
>>
> 
> SNIP
> 
>> -----
>> ####################### JP settings ##############################
>> # Only if interactive bash with a terminal!
>> [ -t 1 -a -n "$BASH_VERSION" ] && {
>>    PS1='\n[\u@\h:T\l:L$SHLVL:C\!:J\j:\D{%Y-%m-%d_%H:%M:%S_%Z}]\n$PWD\$ '
>>    alias ll='ls --color=auto -F -h -l'
>>    alias md='mkdir'
>>    alias vzip='unzip -lvM'
>>    export LESS='--LONG-PROMPT --LINE-NUMBERS --ignore-case --QUIET
>> --no-init'
>>    bind '"\e[A": history-search-backward'
>>    bind '"\e[B": history-search-forward'
>>    bind '"\C-i": menu-complete'
>>    bind 'set completion-ignore-case on'
>>    export HISTCONTROL='erasedups:ignoredups:ignorespace'
>>    export HISTIGNORE='&:[ ]*'    # bash >= 3, omit dups & lines starting
>> with space
>>    export MANWIDTH=80            # man page width, use < 80 if COLUMNS=80
>> & less -N
>>    export VISUAL='vi'
>>    function mcd {
>>      mkdir -p "$1"
>>        cd "$1"
>>    }
>> }
>> -----
>>
>> Most of that should be clear, but the 4 `bind` commands are really the
>> key in the context of the discussion with Mike.  The first two set it so
>> that when you type the first few characters of a commend then hit up
>> arrow, it will search.  E.g., type "vi " then hit up arrow for the last
>> `vi` command.  Keep hitting up or down arrow to scroll the list of `vi`
>> commands in your history.  REALLY useful, should be the default (might
>> be the default in zsh).
>>
>> The 3rd `bind` command changes tab completion to both display all the
>> possible tab completion alternatives and to cycle through them at each
>> tab press.
>>
>> The 4th one makes tab completion case insensitive.
>>
>> There are LOTS more things you can tweak in Readline, check out the
>> docs.  And you can get the Readline docs, and a whole lot more at the
>> following page, which I amusingly generate using a Perl script:
>>     http://www.bashcookbook.com/bashinfo/
>>     http://www.bashcookbook.com/bashinfo/#readline

Later,
JP
--  -------------------------------------------------------------------
JP Vossen, CISSP | http://www.jpsdomain.org/ | http://bashcookbook.com/
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