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

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