Shiny new tricks
This commit is contained in:
lhark
parent
24db58420f
commit
921d9c6c97
78
how_to
78
how_to
|
|
@ -218,6 +218,8 @@ PDF :
|
|||
Extract pages :
|
||||
pdftk input.pdf cat <range> output out.pdf
|
||||
# range can be <start>-<end>, more info at pdftk --help
|
||||
Uncompress pdf file content :
|
||||
pdftk input.pdf output output.pdf uncompress
|
||||
Add images and other files in a single pdf:
|
||||
convert [jpg|png|txt|pdf|...] output.pdf
|
||||
# Might need to tweak /etc/ImageMagick-7/policy.xml
|
||||
|
|
@ -225,6 +227,8 @@ PDF :
|
|||
Fill form & annotate:
|
||||
For well formatted interactive forms:
|
||||
evince
|
||||
For Adobe type forms (AcroForm / XFA):
|
||||
pdfjs # (supports forms since 2.6.347 / firefox 81)
|
||||
For non-interactive PDF:
|
||||
xournal
|
||||
libreoffice Draw
|
||||
|
|
@ -370,6 +374,16 @@ Video and audio editing:
|
|||
xdotool selectwindow getwindowgeometry | awk '/Position/{printf $2" "$4" "} /Geometry/{printf $2" "}' | sed 's/)//' | read OFFSET SCREEN SIZE; ffmpeg -video_size $SIZE -framerate 30 -f x11grab -i "$DISPLAY.$SCREEN+$OFFSET" -vf "scale=2*trunc(iw/2):-2,setsar=1" -pix_fmt yuv420p out.mp4
|
||||
Filter doc:
|
||||
# https://trac.ffmpeg.org/wiki/FilteringGuide
|
||||
Create captioned gif from mp4:
|
||||
# https://nickcanzoneri.com/ffmpeg/gif/2018/11/20/captioned-gifs-with-ffmpeg.html
|
||||
# https://stackoverflow.com/a/14283648 // recale
|
||||
# https://video.stackexchange.com/a/20106 // font style
|
||||
text.srt:
|
||||
1 # Sequence number
|
||||
00:00:00,000 --> 00:00:01,900 # Start and end timestamps
|
||||
Your text here # Actual text
|
||||
# Mandatory empty line
|
||||
ffmpeg -i in.mp4 -vf "scale=512:-2:flags=lanczos,split[x][z];[z]palettegen[y];[x][y]paletteuse,subtitles=text.srt:force_style='FontName=Oswald,Fontsize=80,FontWeight=Bold'" -r 10 out.gif
|
||||
|
||||
ImageMagick:
|
||||
crop to aspect ratio
|
||||
|
|
@ -402,13 +416,23 @@ Mount as user:
|
|||
sudo chown <user> /mnt
|
||||
|
||||
Borg backup:
|
||||
borg init --encryption=repokey-blake2 </repo>
|
||||
borg create -v --stats --progress --compression zlib "/mnt/<machine>/home/::{now}" /home/<user>
|
||||
# Example repo: /mnt/<machine>/home
|
||||
# Dry run: -n
|
||||
# Avoid mixing users in single repo (don't create archives from different users in a single repo)
|
||||
[sudo] borg init --encryption=repokey-blake2 </repo>
|
||||
borg create -v --stats --progress --compression zlib --exclude ~/.local/share/Steam "</repo>::{now}" /home/<user>
|
||||
sudo borg create -v --stats --progress --compression zlib "</repo>::etc-{now}" /etc
|
||||
sudo borg create -v --stats --progress --compression zlib --exclude /var/cache --exclude /var/tmp "</repo>::var-{now}" /var
|
||||
borg list </repo>
|
||||
borg check --verify-data --progress </repo>
|
||||
borg mount </repo> </mount>
|
||||
borg prune -v --list --keep-daily=7 --keep-weekly=4 --keep-monthly=6 </repo>
|
||||
|
||||
# Restoring
|
||||
borg list </repo>
|
||||
borg mount </repo>::"<name>" /mnt/borg
|
||||
borg umount /mnt/borg
|
||||
|
||||
Serial terminal
|
||||
st -l /dev/ttyUSB0 <baud>
|
||||
|
||||
|
|
@ -564,6 +588,8 @@ Maildir tweaking:
|
|||
for f in new/*; do mv "$f" "cur/${f##*/}:2,S"; done
|
||||
# ${f##*/} removes path prefix.
|
||||
# ":2,S" is a maildir suffix (S=seen)
|
||||
Cleanup maildir folder after messing around (requires mblaze):
|
||||
mlist <folder> | mrefile <folder>
|
||||
|
||||
Install 64 bits kernel on 32 bits system (and 64 bits hardware) (bad idea)
|
||||
wiki.archlinux.org/index.php/Migrating_between_architectures
|
||||
|
|
@ -892,3 +918,51 @@ MacOS survival guide (Because the "user friendly" OS has worse affordances than
|
|||
Release <Alt>
|
||||
Maximizing window WITHOUT fullscreen
|
||||
Double click window title bar
|
||||
|
||||
Mounting .bin/.cue image files:
|
||||
$ sudo pacman -S bchunk
|
||||
$ bchunk file.bin file.cue output
|
||||
$ sudo mount output01.iso /mnt -o loop,ro
|
||||
|
||||
Manual IMAP connection:
|
||||
# https://www.atmail.com/blog/imap-101-manual-imap-sessions/
|
||||
# https://stackoverflow.com/questions/14959461/how-to-talk-to-imap-server-in-shell-via-openssl
|
||||
|
||||
$ openssl s_client -connect <imap server>:993 -crlf [-quiet]
|
||||
$ openssl s_client -connect <imap server>:143 -crlf -starttls imap [-quiet]
|
||||
# IMAP needs an incrementing prefix before each command
|
||||
A1 login <login> "<password>"
|
||||
# list everything
|
||||
A2 list "" "*"
|
||||
# list everything under a particular prefix
|
||||
A3 list "INBOX" "*"
|
||||
A99 logout
|
||||
|
||||
gdb tricks:
|
||||
Easily print attributes of array elements:
|
||||
# https://agateau.com/2008/gdb-trick-the-poor-man-loop
|
||||
(gdb) set $pos = 0
|
||||
(gdb) print foo[$pos++].attribute
|
||||
(gdb) <enter>
|
||||
(gdb) <enter>
|
||||
...
|
||||
Or use a real loop:
|
||||
(gdb) set $i = 0
|
||||
(gdb) while ($i < <length>)
|
||||
> print foo[$i++].attribute
|
||||
> end
|
||||
|
||||
Non-standard zsh cd trick:
|
||||
# https://dataswamp.org/~solene/2020-09-04-cd-command.html
|
||||
$ pwd
|
||||
/tmp/pobj/foobar-1.2.0/work
|
||||
$ cd 1.2.0 2.4.0
|
||||
/tmp/pobj/foobar-2.4.0/work
|
||||
|
||||
Check for available package updates with Arch/Artix:
|
||||
sudo pacman -S pacman-contrib
|
||||
checkupdates
|
||||
|
||||
Git push and pull using different URL/protocols:
|
||||
# https://www.scivision.dev/git-pull-https-push-ssh/
|
||||
git config url."git@example.org:user/".pushInsteadOf "https://example.org/user/"
|
||||
|
|
|
|||
Loading…
Reference in a new issue