All commands (13,025)
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Compactly display a bitcoin-cli fee estimate in satoshis/Byte, sat/B, date time stamp. Change the 6 to the desired number of confirmations. Display in btc/KB unit of measure:
printf %g "$(bccli estimatesmartfee 6 "ECONOMICAL" | jq .feerate)";printf " btc/KB estimated feerate for 6 confirmations\nMultiply by 100,000 to get sat/B\n";Two settings for estimate mode are "ECONOMICAL". "CONSERVATIVE" is the same as "UNSET" # jq is a json filter.sudo apt-get install jqShow Sample Output0printf %g "$(bitcoin-cli estimatesmartfee 6 "ECONOMICAL" | jq .feerate*100000)";printf " sat/B estimated feerate for 6 confirmations as of $(date +%c)\nDivide by 100,000 to get btc/KB\n" -
1for i in *.pdf; do mv "$i" CS749__"$i"; done
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0watch -n 1 curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'
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Frustrated with the manual domain migration process AWS has, I unsuccessfully tried to install cli53, route53-transfer. I instead wrote this oneliner to ease the export (which is not supported via the AWS console ATM). The output can be easily pasted into the "Import Hosted Zone" dialog in Route53. SOA/NS records are excluded since they cannot be automatically imported. Show Sample Output
0echo -e "\$ORIGIN\tumccr.org.\n\$TTL\t1h\n" && aws route53 list-resource-record-sets --hosted-zone-id Z1EEXAMPLE9SF3 | jq -r '.ResourceRecordSets[] | [.Name, .Type, .ResourceRecords[0].Value] | join("\t")' - | grep -vE "NS|SOA" -
0sed -i 's/\r//g somefile.txt
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I didn't come up with this myself, but I always add this to my .bash_aliases file. It's essentially the same idea as running "sudo !!" except it's much easier to type. (You can't just alias "sudo !!", it doesn't really work for reasons I don't understand.) "fc" is a shell built-in for editing and re-running previous commands. The -l flag tells it to display the line rather than edit it, and the -n command tells it to omit the line number. -1 tells it to print the previous line. For more detail:
help fc1alias please='sudo $(fc -ln -1)' -
Simply change the years listed in the first seq, and it will print out all the months in that span of years that have Friday the 13ths in them. Show Sample Output
0for y in $(seq 1996 2018); do echo -n "$y -> "; for m in $(seq 1 12); do NDATE=$(date --date "$y-$m-13" +%A); if [ $NDATE == 'Friday' ]; then PRINTME=$(date --date "$y-$m-13" +%B);echo -n "$PRINTME "; fi; done; echo; done -
0zgrep -i --color=always "string" files.gz | sort -k 2,3
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0zgrep -i --color=always "search" file.gz | less -R
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This function make it easy to compute X/Y as a percentage. The name "wpoxiy" is an acronym of "what percentage of X is Y" Show Sample Output
0function wpoxiy () { # What percentage of X is Y? Where percent/100 = X/Y => percent=100*X/Y # Example: wpoxiy 10 5 # 50.00% # Example: wpoxiy 30 10 # 33.33% echo $(bc <<< "scale=2; y=${1}; x=${2}; percent=x*100/y; percent")"%"; } -
Do you ever want to know which day of week was your birhday! Now you can check that with this command, just set your birh date at the beginning (My bday in the example) and the dates will be revealed. ;) Show Sample Output
2DAY=01; MONTH=07; YEAR=1979; CURRENT_YEAR=$(date +%Y); for i in $(seq $YEAR $CURRENT_YEAR); do echo -n "$i -> "; date --date "$i-$MONTH-$DAY" +%A; done -
Run netstat as root (via sudo) to get the ID of the process listening on the desired socket. Use awk to 1) match the entry that is the listening socket, 2) matching the exact port (bounded by leading colon and end of column), 3) remove the trailing slash and process name from the last column, and finally 4) use the system(…) command to call kill to terminate the process. Two direct commands, netstat & awk, and one forked call to kill. This does kill the specific port instead of any port that starts with 50. I consider this to be safer.
1sudo netstat -plnt | awk '($4 ~ /:50$/){sub(/\/.*/, "", $7); system("sudo kill " $7)}' -
0sudo netstat -plnt | grep :50 | awk '{print $7}' | awk -F/ '{print $1}' | xargs kill -9
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1find . -regextype posix-egrep -regex '.+\.(c|cpp|h)$' -not -path '*/generated/*' -not -path '*/deploy/*' -print0 | xargs -0 ls -L1d
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Assumes you've downloaded Toni Corvera's vcs script (http://p.outlyer.net/vcs), have it in your PATH, and have installed the script's dependencies. Generates a video contact sheet of 24 thumbnails and 3 thumbnails per column. The bold font and white-on-black color scheme keeps the text readable at the chosen 70% JPEG compression quality, which keeps the file size at a manageable level. You can go even lower with the quality and get a good looking result.
2vcs -c 3 -H 220 -n 24 -dt -ds -dp -j --anonymous -O bg_heading=black -O bg_sign=black -O fg_heading=white -O fg_heading=white -O fg_sign=white -O fg_title=white -O font_heading=DejaVu-Sans-Bold -O quality=70 -
Random text of length "$1" without the useless cat command.
1genRandomText() { tr -cd '[:alpha:]' < /dev/urandom | head -c "$1"; } -
Remove unused images -a Remove all unused images, not just dangling ones -f Do not prompt for confirmation Show Sample Output
0docker image prune -
0docker rmi `docker images -a -q`
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I had to upload some songs to YouTube a while back and used this method
0for name in *.mp3; do ffmpeg -loop 1 -i imagename.jpg -i "$name" -shortest -c:v libx264 -preset ultrafast -c:a copy "${name%.*}.mp4"; done -
2grep -ir string *
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-2grep string * -R
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Useful when developing and you donut usually have other docker commands running Show Sample Output
0docker kill $(docker ps -q) -
0(nohup your-command your-args &>/dev/null &)
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(echo "https://example.com/"; echo "https://example.com/"; echo "https://example.com/"; echo "https://example.com/") | parallel -k 'ab -n 10000 -c 15 {}'
0cat url_list.txt | parallel -k 'ab -n 10000 -c 15 {}' -
0sudo tcpdump -i lo -nv ip
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