Force crontab editor :: default editor



  • Many times you type:

    crontab -e
    

    And end up with key bindings your not used to. (h,j,k,i) As in vi or ed.

    Say you normally use nano:

    export VISUAL=nano; crontab -e
    

    Boom, crontab will open and nano will be your editor.


    Same goes for vi:

    export VISUAL=vim; crontab -e
    

    Then again maybe you want to use your preferred editor always, or as default.

    Get a list of available editors currently install on your system by running:

    update-alternatives --list editor
    

    In this case, the output is:

    /bin/ed
    /bin/nano
    /usr/bin/vim.gnome
    /usr/bin/vim.tiny
    

    So you may combine the above for on demand usage such as:

    export VISUAL=ed; crontab -e
    

    Or:

    export VISUAL=vim.gnome; crontab -e
    

    ect…


    To make one specific editor default to your users profile, you must edit:

    ~/.profile
    

    So for example if your enjoying the ease of nano:

    nano ~/.profile
    

    And add these lines as follows:

    EDITOR=nano
    VISUAL=$EDITOR
    export EDITOR VISUAL
    

    Replacing in the above case ‘nano’ with your desired default editor.


    When you run the following as root, you are changing the default editor system wide, or all users. In this case, we can use ‘editor’, to see which editors are currently available on the system, as well as priorities, paths, and status:

    update-alternatives --config editor
    

    The output will be:

      Selection    Path                Priority   Status
    ------------------------------------------------------------
    * 0            /usr/bin/vim.gnome   60        auto mode
      1            /bin/ed             -100       manual mode
      2            /bin/nano            40        manual mode
      3            /usr/bin/vim.gnome   60        manual mode
      4            /usr/bin/vim.tiny    10        manual mode
    Press enter to keep the current choice[*], or type selection number: 
    

    Then simply type the number of the default system wide editor you wish.





Tmux Commands

screen and tmux

A comparison of the features (or more-so just a table of notes for accessing some of those features) for GNU screen and BSD-licensed tmux.

The formatting here is simple enough to understand (I would hope). ^ means ctrl+, so ^x is ctrl+x. M- means meta (generally left-alt or escape)+, so M-x is left-alt+x

It should be noted that this is no where near a full feature-set of either group. This - being a cheat-sheet - is just to point out the most very basic features to get you on the road.

Trust the developers and manpage writers more than me. This document is originally from 2009 when tmux was still new - since then both of these programs have had many updates and features added (not all of which have been dutifully noted here).

Action tmux screen
start a new session tmux OR
tmux new OR
tmux new-session
screen
re-attach a detached session tmux attach OR
tmux attach-session
screen-r
re-attach an attached session (detaching it from elsewhere) tmux attach -d OR
tmux attach-session -d
screen -dr
re-attach an attached session (keeping it attached elsewhere) tmux attach OR
tmux attach-session
screen -x
detach from currently attached session ^b d OR
^b :detach
^a ^d OR
^a :detach
rename-window to newname ^b , <newname> OR
^b :rename-window <newn>
^a A <newname>
list windows ^b w ^a w
list windows in chooseable menu ^a "
go to window # ^b # ^a #
go to last-active window ^b l ^a ^a
go to next window ^b n ^a n
go to previous window ^b p ^a p
see keybindings ^b ? ^a ?
list sessions ^b s OR
tmux ls OR
tmux list-sessions
screen -ls
toggle visual bell ^a ^g
create another window ^b c ^a c
exit current shell/window ^d ^d
split window/pane horizontally ^b " ^a S
split window/pane vertically ^b % ^a |
switch to other pane ^b o ^a <tab>
kill the current pane ^b x OR (logout/^D)
collapse the current pane/split (but leave processes running) ^a X
cycle location of panes ^b ^o
swap current pane with previous ^b {
swap current pane with next ^b }
show time ^b t
show numeric values of panes ^b q
toggle zoom-state of current pane (maximize/return current pane) ^b z
break the current pane out of its window (to form new window) ^b !
re-arrange current panels within same window (different layouts) ^b [space]
Kill the current window (and all panes within) ^b killw [target-window]
  • Mount NFS from Truenas

    mkdir -p /media/rick/pool1 chown -R rick:rick /media/rick/pool1

    Add the automount to: /etc/fstab

    truenas.thecave:/mnt/pool1 /media/rick/pool1 nfs user,auto 0 0

    Retstart Nautilus to see the share in files:

    killall nautilus

    For other shares, just repeat the same process under directory ‘media’ with the name of the share substituted

    read more
  • Again running smartctl after all is said and done:

    smartctl --all /dev/sda

    ddrescue-smartctl-after-rescue.png ddrescue-smartctl-2.png

    Yet an old drive in itself, I run the wheels off of them, and monitor regularly as anyone should.

    read more
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