Linux CLI commands I Cannot Remember...

Random CLI Commands

htop - graphical process monitor
iptraf - graphical IP traffic monitor
meshmap - HSMM mesh map generator
figlet - make ASCII letters
chirpw - radio programming
camgrab - CLI webcam pic grabber
pwgen - password generator
links2 - ncurses web browser
inxi -Fx - System information
weather - cli weather info
another weather - curl wttr.in/AVL
price of $BTC - curl rate.sx/BTC or add a time span curl rate.sx/BTC@30d

CLI Commands with some useful syntax

• list the fingerprint of key

ssh-keygen -lf ~/.ssh/id_rsa.pub

• parse fail2ban logs

1. cat /var/log/fail2ban.log | grep Ban | awk '{print $6,$7,$1,$2}' | uniq
   
2. sudo cat fail2ban.log | grep Ban | awk '{print $8}' | sort | uniq -c
   
3. sudo cat /var/log/fail2ban.log | grep Ban | awk '{print $8,$7}' | sort | uniq -c
   

• useless waste of time and peta-flops

cat /dev/urandom | hd | grep "ca fe"

• Scrape 1FC data from RadioReference
  • parse RadioReference.com 1FC data from website and save CCs to list

wget -O 1fc.html http://www.radioreference.com/apps/db/?sid=7118 && cat 1fc.html | sed 's/[a-zA-Z<>="\/: #-]/ /g' | grep "[7,8][5,6,7][0-9].[0-9][0-9][0-9][0-9][0-9]c" | awk '{ print $6 }' > 1fc.cc  

• • or the new version

wget -O 1fc.html http://www.radioreference.com/apps/db/?sid=7118 && cat 1fc.html | grep '[7,8][0-9][0-9].[0-9]\+c' | sed 's/[><]/ /g' | awk '{print $6}' | sort -un > 1fc.cc && wc -l 1fc.cc >> 1fc.cc && cat 1fc.cc | sed 's/1fc.cc/Control Channels/g' > 1fc.txt && cat 1fc.txt

• • parse the 1fc.html data for ALL freqs in use

cat 1fc.html | grep "[7,8][0-9][0-9].[0-9][0-9][0-9][0-9][0-9]" | sed 's/[a-zA-Z<>="\/: #-]//g' > 1fc.all

• read the "p" text in a news webpage

cat index.html | grep '<p>' | sed 's/<[^<>]*>//g' | sed 's/[^>]*>//g' | sed 's/<[^<]*//g' | sed 's/MORE//g' | festival --tts

• working outbound mail CLI

cat /var/log/apache2/error.log | mail -s "Apache Error Logs" mail@domain.tld

• open udp ports for chromecast iptables -I INPUT -p udp -m udp --dport 32768:61000 -j ACCEPT
  
• working RTL-SDR ADS-B webserver $PATH/dump1090 --raw --net --net-http-port 8008 & mono $PATH/VirtualRadar.exe
  
• modify file timestamp touch -t YYYYMMDDHHMM filename.ext
  
• rename images by their EXIF timestamp exiv2 -r'%Y%m%d_%H%M%S' -F *.JPG and exiv2 -r'%Y%m%d_%H%M%S_COMMENT_STUFF' -F *.JPG
  
• EAS decoder multimon-ng -a EAS -t wav $FILE
  
• rtl-fm play audio localy broadcast FM rtl_fm -g 50 -f 99.9M -M wfm -s 180k -E deemp | play -r 180k -t raw -e s -b 16 -c 1 -V1 - lowpass 16k
  
• lock screen rotation in Ubuntu 18.04 on HP ProBook 6560b gsettings set org.gnome.settings-daemon.plugins.orientation active false
  
• imagemagick perspective with tiling convert flag.jpg -virtual-pixel tile -distort Perspective '0,0 30,55 2121,0 917,35 0,1414 55,1111 2121,1414 820,707' flagA.jpg
  
• imagemagick add watermark/overlay with opacity convert flagA.jpg -resize 1024x1024 miff:- | composite -dissolve 37% -gravity center overlay.png - overlayflag.png
  
• convert .mov to .mp4 with ffmpeg - ffmpeg -i my-video.mov -vcodec h264 -acodec mp2 my-video.mp4
  
• reload .bashrc . ~/.bashrc
  

• Convert vertically shot video (I secretly hate you) to proper 16x9 format with "echo pillarboxing" effect on the sides. Ok, it's not a secret. I hate you for vertical video.

ffmpeg -i input.mp4 -vf 'split[original][copy];[copy]scale=ih*16/9:-1,crop=h=iw*9/16,gblur=sigma=20[blurred];[blurred][original]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2' output.mp4 

• Turn a multi-page pdf into a single page pdf

pdftk full-pdf.pdf cat 1 output outfile_page1.pdf

More than commands...

Add swap space in Ubuntu 18.04LTS

• • Directions Here
  • from - https://linuxize.com/post/how-to-add-swap-space-on-ubuntu-18-04/

Scan and check USB drives

• • Directions Here
  • from - https://www.debugpoint.com/2020/07/scan-repair-bad-sector-disk-linux/

• Resolve TOR .onion and regular DNS

Bypass CGNAT(NAT444) with Wireguard and a VPS

• • Directions Here
  • lifted from https://hacdias.com/2020/11/30/access-network-behind-cgnat

Batch transcode .wma to .mp3

• • wma2mp3.sh
  • lifted from https://askubuntu.com/questions/55352/convert-library-of-wma-tracks-to-mp3s

Add Alby support to Azuracast Public Page

docker exec -t $YOUR_AZURACAST_CONTAINER /bin/bash
nano /var/azuracast/www/templates/frontend/public/index.phtml

add the line below in the appropriate place with all the other <meta blah blah> tags

<meta name="lightning" content="lnurlp:$YOUR_ALBY_NAME@getalby.com" />

Boom!!

Update Umbrel from CLI

sudo ./PATHTOUMBREL/scripts/update --repo getumbrel/umbrel

Mosquitto MQTT Broker with Docker Compose

Directions Here

• credit to https://techoverflow.net/2021/11/25/how-to-setup-standalone-mosquitto-mqtt-broker-using-docker-compose/

Add font to ubuntu

Many fonts are packaged for Ubuntu and available via the "Fonts" category of the Ubuntu Software Center. If you prefer apt-get, search for packages starting with otf- or ttf-. Font files that are placed in the hidden .fonts directory of your home folder will automatically be available (but /etc/fonts/fonts.conf indicates it will be removed soon.). You can also place them in the ~/.local/share/fonts directory on newer versions of Ubuntu per the comments below. You can also double-click on the font file (or select Open with Font Viewer in the right-click menu). Then click the Install Font button. If you need the fonts to be available system-wide, you'll need to copy them to /usr/local/share/fonts and reboot (or manually rebuild the font cache with fc-cache -f -v). You can confirm they are installed correctly by running fc-list | grep "<name-of-font>" You may need to restart some programs, like OpenOffice Writer, before they actually show the new fonts (usually such programs are caching the font list when they start up). Edit: Changed advice to manually install into /usr/local/share/fonts instead of /usr/share/fonts to reflect comments and best practice.