All commands (13,268)

  • Uses the shell builtin `declare` with the '-f' flag to output only functions to grep out only the function names. You can use it as an alias or function like so: alias shfunctions="builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'" shfunctions () { builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'; } Show Sample Output

    builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'
    sciro · 2018-07-23 05:24:04 0

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    docker images | grep -v REPOSITORY | awk '{print $1}' | xargs -L1 docker pull
    imjoseangel · 2018-07-19 09:14:14 0
  • Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale. Show Sample Output

    for i in {2018..2025}-{01..12}-13; do [[ $(date --date $i +"%u" | grep 5) != 5 ]] || echo "$i Friday the 13th"; done
    test666v2 · 2018-07-10 21:31:02 0

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    ip route add default via dev ens33
    kdetony · 2018-07-10 17:55:25 0
  • Alter the years in the first brace expansion to select your year range. Modify date format to your liking but leave " %w" at the end. Show Sample Output

    for i in {2018..2022}-{01..12}-13; do date --date $i +"%Y %B %w" | sed '/[^5]$/d; s/ 5*$//'; done
    justsomeguy · 2018-07-09 15:47:39 0
  • Compare the content of the files in the current directory with files of the same name in the duplicate directory. Pop Quiz: You have a duplicate of a directory with files of the same name that might differ. What do you do? You could use diff to compare the directories, but that's boring and it isn't as clever as find -print0 with xargs. Note: You must omit stderr redirect 2>/dev/null to see the list of missing files from DUPDIR, if any. Hint: Redirect stderr to a new file to produce a more readable list of files that are missing from DUPDIR. Warning: This doesn't tell you if DUPDIR contains files not found in the current directory so don't delete DUPDIR. Show Sample Output

    find . -maxdepth 1 -mindepth 1 -print0 | xargs -0 -n 1 -I % cmp % /DUPDIR/% 2>/dev/null
    RiskNerd · 2018-07-08 02:25:57 0
  • The dialog utility is used to create a basic level graphical user interface. We can use this in Shell script to create very useful programs. Show Sample Output

    dialog --textbox 50 1000
    kalilinuxtr · 2018-07-06 12:51:48 0
  • Shorter version using --tag

    parallel --tag echo '$(du -s {} | awk "{print \$1}") / $(find {} | wc -l)' \| bc -l ::: *
    IndustrialJoe · 2018-07-05 18:33:21 0

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    sed 's/\"/\\\"/g' json_file | tr -d '\n' | tr -d '[[:blank:]]'
    jgleeson · 2018-07-05 10:58:47 0
  • Creates one letter folders in the current directory and moves files with corresponding initial in the folder.

    for i in *; do I=`echo $i|cut -c 1|tr a-z A-Z`; if [ ! -d "$I" ]; then mkdir "$I"; fi; mv "$i" "$I"/"$i"; done
    z3bu · 2018-06-29 11:37:04 1
  • Using to count all sentences in CoNLL data format

    echo $(( $(grep -c '^ $' file_name) / 2 ))
    hiepdev · 2018-06-28 11:31:14 0

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    genRandomText() { local n=$1; while [ $((n--)) -gt 0 ]; do printf "\x$(printf %x $((RANDOM % 26 + 65)))" ; done ; echo ; }
    ginochen · 2018-06-27 01:04:45 0
  • I removed the dependency of the English language Show Sample Output

    for y in $(seq 1996 2018); do echo -n "$y -> "; for m in $(seq 1 12); do NDATE=$(date --date "$y-$m-13" +%w); if [ $NDATE -eq 5 ]; then PRINTME=$(date --date "$y-$m-13" +%B);echo -n "$PRINTME "; fi; done; echo; done
    ginochen · 2018-06-25 09:20:57 1
  • Compactly display a bitcoin-cli fee estimate in satoshis/Byte, sat/B, date time stamp. Change the 6 to the desired number of confirmations. Display in btc/KB unit of measure: printf %g "$(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 jq Show Sample Output

    printf %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"
    deinerson1 · 2018-06-20 13:40:32 0

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    for i in *.pdf; do mv "$i" CS749__"$i"; done
    ialmaescura · 2018-06-18 18:57:26 0

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    watch -n 1 curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'
    jmarek · 2018-06-17 15:58:39 0
  • 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

    echo -e "\$ORIGIN\\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"
    brainstorm · 2018-06-15 01:19:21 0

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    sed -i 's/\r//g somefile.txt
    tourch403 · 2018-06-14 20:51:11 1
  • 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 fc

    alias please='sudo $(fc -ln -1)'
    suspenderguy · 2018-06-13 20:20:19 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

    for 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
    suspenderguy · 2018-06-13 20:11:46 0

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    zgrep -i --color=always "string" files.gz | sort -k 2,3
    jgleeson · 2018-06-12 20:00:03 0

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    zgrep -i --color=always "search" file.gz | less -R
    jgleeson · 2018-06-12 18:45:05 0
  • 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

    function 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")"%"; }
    mpb · 2018-06-10 22:43:20 0
  • 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

    DAY=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
    nordri · 2018-06-08 07:56:59 1
  • 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.

    sudo netstat -plnt | awk '($4 ~ /:50$/){sub(/\/.*/, "", $7); system("sudo kill " $7)}'
    drscriptt · 2018-06-07 17:01:49 0
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Print text string vertically, one character per line.

Fastest segmented parallel sync of a remote directory over ssh
Mirror a remote directory using some tricks to maximize network speed. lftp:: coolest file transfer tool ever -u: username and password (pwd is merely a placeholder if you have ~/.ssh/id_rsa) -e: execute internal lftp commands set sftp:connect-program: use some specific command instead of plain ssh ssh:: -a -x -T: disable useless things -c arcfour: use the most efficient cipher specification -o Compression=no: disable compression to save CPU mirror: copy remote dir subtree to local dir -v: be verbose (cool progress bar and speed meter, one for each file in parallel) -c: continue interrupted file transfers if possible --loop: repeat mirror until no differences found --use-pget-n=3: transfer each file with 3 independent parallel TCP connections -P 2: transfer 2 files in parallel (totalling 6 TCP connections) sftp://remotehost:22: use sftp protocol on port 22 (you can give any other port if appropriate) You can play with values for --use-pget-n and/or -P to achieve maximum speed depending on the particular network. If the files are compressible removing "-o Compression=n" can be beneficial. Better create an alias for the command.

Command Line to Get the Stock Quote via Yahoo
Retrieve the current stock price from Yahoo Finance. The output is simply the latest price (which could be delayed). If you want to look up stock for a different company, replace csco with your symbol.

Batch edition of all Writer files in the current directory (body text)
This function does a batch edition of all OOO3 Writer files in current directory. It uses sed to search a FOO pattern into body text of each file, then replace it to foo pattern (only the first match) . I did it because I've some hundreds of OOO3 Writer files where I did need to edit one word in each ones and open up each file in OOO3 gui wasn't an option. Usage: bsro3 FOO foo

View any already in progress copy command in detail
If you spot a dubious looking cp command running you can use this command to view what is being copied and to where. 1234 is the PID of the cp command being passed to the lsof utility. 3r.*REG will display the file/directory that is being read/copied. 4w.*REG will display the destination it is being written to.

Generate random valid mac addresses
First set the variable $hexchars: $hexchars="0123456789ABCDEF" Change the number in the first for loop if you need less then 1200 mac addresses

Install pip with Proxy
Installs pip packages defining a proxy

Super Speedy Hexadecimal or Octal Calculations and Conversions to Decimal.
^Hexadecimal Ten minus Octal Ten is Eight(in Decimal). $ echo "$(( 0xaf )) = $(( 0257 ))" ^Hexadecimal AF and Octal 257 are both Decimal 175.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

find process associated with a port
e.g. fuser 25/tcp (see which pid is listening on smtp)

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