You want to sign PDF's?

nospam@example.com (Ludwig Hertel) — Wed, 10 Jul 2024 08:16:00 +0200

Hi wouldn't it be nice to sign PDF without any external service?

Give JSignPDF a try JSignPdf - Just sign them! | JSignPdf (intoolswetrust.github.io)

GitHub - intoolswetrust/jsignpdf: PDF signing software written in Java. It supports visible signatures, timestamping, certificate verification and many other cool features

or...

In Ubuntu install apt-get install xournal add annotate picture as sign and sign all document by yours pgp key.

Sign:

gpg --clearsign --output=sign_file.pdf file.pdf

Verify:

$ gpg --verify sign_file.pdf

gpg: Signature made czw, 3 lut 2022, 12:45:58 CET
gpg:                using RSA key 14644CCD80A59C3A15E226568C199B37E09FA079
gpg: Good signature from "xxxxx" [ultimate]
gpg:                 aka "xxxxxx" [ultimate]

Usage of a terminal multiplexer tmux vs screen

nospam@example.com (Ludwig Hertel) — Wed, 07 Jun 2023 12:02:00 +0200

terminal multiplexer

Whenever you connect to a machine I highly recommend the usage of a terminal multiplexer.

the most common are tmux, screen.

screen uses ctrl+a for command

tmux uses ctrl+b for command

tmux vs. screen commands

from TIL/tmux/tmux_vs_screen-commands-v2.md at master · P7h/TIL · GitHub

Action	tmux	screen
start a new session	`tmux` `tmux new` `tmux new-session`	`screen`
start a new session with a name	`tmux new -s name`	`screen -S name`
re-attach a detached session	`tmux attach` `tmux attach-session`	`screen -r`
re-attach a detached session with a name	`tmux attach -t name` `tmux a -t name`	`screen -r name`
re-attach an attached session (detaching it from elsewhere)	`tmux attach -d` `tmux attach-session -d`	`screen -dr`
re-attach an attached session (keeping it attached elsewhere)	`tmux attach` `tmux attach-session`	`screen -x`
detach from currently attached session	`^b` `d` `^b` `:detach`	`^a` `d`
rename-window to newname	`^b` `,` `^b` `:rename-window`	`^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` `l`
go to next window	`^b` `n`	`^a` `n`
go to previous window	`^b` `p`	`^a` `p`
see keybindings	`^b` `?`	`^a` `?`
list sessions	`^b` `s` `tmux ls` `tmux list-sessions`	`screen -ls`
toggle visual bell		`^a` `^g`
kill the current pane	`^b` `x` `logout` `^D`	`^a` `X`
destroy the current window	`^b` `&`	`^a` `k` `^a` `^k`
exit current shell	`^d`	`^d`
create another window	`^b` `c`	`^a` `c`
switch to another pane	`^b` `o`	`^a` `Tab`
split pane horizontally	`^b` `"`	`^a` `S` then `^a` `Tab` and `^a` `c`
split pane vertically	`^b` `%`	`^a` `\|` then `^a` `Tab` and `^a` `c`
close other panes except the current one	`^b` `!`
swap location of panes	`^b` `^o`
re-arrange current panes within same window (different layouts)	`^a` `space`
show time	`^b` `t`
show numeric values of panes	`^b` `q`
enable scroll / view scrollback	`^b` `[` (and to exit `q`)	`^a` `[` (and to exit `q`)
copy text in one view		`^a` `[` `^m` (highlight text and `enter`) (to save: `^a` `>`)
paste text into a view		`^a` `]`

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You want to sign PDF's?

Usage of a terminal multiplexer tmux vs screen

terminal multiplexer

tmux vs. screen commands