Commands using tr (292)


  • 1
    tr A-Z a-z | tr -d "[[:punct:]][[:digit:]]" | tr ' /_' '\n' | sort | uniq -c
    minduim · 2010-10-19 19:29:32 1

  • 0
    tr A-Z a-z | tr -d 0-9\[\],\*-.?\:\"\(\)#\;\<\>\@ | tr ' /_' '\n' | sort | uniq -c
    gcurious · 2010-10-19 17:21:05 0

  • 1
    curl -s $dellurl$1 | tr "\"" "\n" | grep "</td></tr><tr><td class=" -m 2 | grep -v "Service Tag" | sed 's/>//g' | sed 's/<\/td<\/tr<tr<td class=//g'
    IsraelTorres · 2010-10-13 01:09:30 0

  • 3
    du --max-depth=1|sort -n|cut -f2|tr '\n' '\0'|xargs -0 du -sh 2>/dev/null
    j_melis · 2010-10-08 12:06:50 0

  • -1
    wget -qO - http://i18n.counter.li.org/ | grep 'users registered' | sed 's/.*\<font size=7\>//g' | tr '\>' ' ' | sed 's/<br.*//g' | tr ' ' '\0'
    hunterm · 2010-10-07 03:19:17 0

  • 1
    tr -cd '[:alnum:]' < /dev/urandom | fold -w30 | head -n1
    putnamhill · 2010-09-28 12:25:58 2
  • This command is primarily going to work on linux boxes. and needs to be changed, for example IP=10\.194\.194\.2 PORT=389


    1
    netstat -n | grep '^tcp.*<IP>:<PORT>' | tr " " | awk 'BEGIN{FS="( |:)"}{print $6}' | sort | uniq -c | sort -n -k1 | awk '{if ($1 >= 10){print $2}}'
    guptavi · 2010-09-16 21:06:30 0
  • Note: Replace 200000 with drive bytes/512, and /dev/sdx with the destination drive/partition. ;) Note: You may need to install pipebench, this is easy with "sudo apt-get install pipebench" on Ubuntu. The reason I hunted around for the pieces to make up this command is that I wanted to specifically flip all of the bits on a new HDD, before running an Extended SMART Self-Test (actually, the second pass, as I've already done one while factory-zeroed) to ensure there are no physical faults waiting to compromise my valuable data. There were several sites that came up in a Google search which had a zero-fill command with progress indicator, and one or two with a fill-with-ones command, but none that I could find with these two things combined (I had to shuffle around the dd command(s) to get this to happen without wasting speed on an md5sum as well). For reference, these are the other useful-looking commands I found in my search: Zero-fill drive "/dev/sdx", with progress indicator and md5 verification (run sudo fdisk -l to get total disk bytes, then divide by 512 and enter the resulting value into this command for a full wipe) dd if=/dev/zero bs=512 count=<size/512> | pipebench | sudo tee /dev/sdx | md5sum And this command for creating a file filled with ones is my other main source (besides the above command and man pages, that is - I may be a Linux newbie but I do read!): tr '\000' '\377' < /dev/zero | dd of=allones bs=1024 count=2k Hope someone finds this useful! :) Cheers, - Gliktch Show Sample Output


    3
    tr '\000' '\377' < /dev/zero | dd bs=512 count=200000 status=noxfer | pipebench | sudo dd of=/dev/sdx
    Gliktch · 2010-08-31 15:38:27 1
  • Tee can be used to split a pipe into multiple streams for one or more process to work it. You can add more " >()" for even more fun. Show Sample Output


    33
    echo "tee can split a pipe in two"|tee >(rev) >(tr ' ' '_')
    axelabs · 2010-08-14 20:38:59 3
  • all files in the directory get moved, in doing so the new name of the file is the original name with out spaces (using translate command)


    -3
    ls | while read -r FILE; do mv -v "$FILE" `echo $FILE | tr -d ' '`; done
    IgnitionWeb · 2010-08-14 14:10:48 0
  • Test whether real-time virus detection is working by running this command and checking for eicar.com in /tmp. Requires real-time scanning to be enabled and active on the /tmp directory. If scanning is active, the file should be quarantined/deleted (depending on your settings) moments after running this command. If not, the (harmless) test file should remain in your /tmp directory.


    1
    echo 'K5B!C%@NC[4\CMK54(C^)7PP)7}$RVPNE-FGNAQNEQ-NAGVIVEHF-GRFG-SVYR!$U+U*' | tr '[A-Za-z]' '[N-ZA-Mn-za-m]' > /tmp/eicar.com
    cyberscribe · 2010-08-13 21:39:35 1
  • This can be particularly useful used in conjunction with a following cut command like echo "hello::::there" | tr -s ':' | cut -d':' -f2 which prints 'there'. Much easier that guessing at -f values for cut. I know 'tr -s' is used in lots of commands here already but I just figured out the -s flag and thought it deserved to be highlighted :) Show Sample Output


    1
    echo "hello::::there" | tr -s ':'
    randy909 · 2010-08-12 16:23:06 0
  • Another way to do it with slightly fewer characters. It doesn't work on Russian characters; please don't vote down because of that. :p It's very handy for those of us working in ascii :) Show Sample Output


    0
    echo StrinG | tr 'A-Z' 'a-z'
    randy909 · 2010-08-12 15:42:56 0

  • 1
    netstat -rn | grep UG | tr -s " " | cut -d" " -f2
    greenmang0 · 2010-08-09 15:25:18 0

  • 0
    TTY=$(tty | cut -c 6-);who | grep "$TTY " | awk '{print $6}' | tr -d '()'
    sharfah · 2010-08-06 13:42:17 3
  • #Sample Usage: # git commit -m"Jira #404 - `whatthecommit`" # Show Sample Output


    -2
    curl -s http://whatthecommit.com/ | tr -s '\n' ' ' | grep -so 'p>\(.*\)</p' | sed -n 's/..\(.*\)..../\1/p'
    sragu · 2010-08-02 03:20:32 0
  • first off, if you just want a random UUID, here's the actual command to use: uuidgen Your chances of finding a duplicate after running this nonstop for a year are about the same as being hit by a meteorite before finishing this sentence The reason for the command I have is that it's more provably unique than the one that uuidgen creates. uuidgen creates a random one by default, or an unencrypted one based on time and network address if you give it the -t option. Mine uses the mac address of the ethernet interface, the process id of the caller, and the system time down to nanosecond resolution, which is provably unique over all computers past, present, and future, subject to collisions in the cryptographic hash used, and the uniqueness of your mac address. Warning: feel free to experiment, but be warned that the stdin of the hash is binary data at that point, which may mess up your terminal if you don't pipe it into something. If it does mess up though, just type reset Show Sample Output


    0
    printf $(( echo "obase=16;$(echo $$$(date +%s%N))"|bc; ip link show|sed -n '/eth/ {N; p}'|grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}'|head -c 17 )|tr -d [:space:][:punct:] |sed 's/[[:xdigit:]]\{2\}/\\x&/g')|sha1sum|head -c 32; echo
    camocrazed · 2010-07-14 14:04:53 0
  • Tired copy paste to get opcode from objdump huh ? Get more @ http://gunslingerc0de.wordpress.com Show Sample Output


    4
    objdump -d ./PROGRAM|grep '[0-9a-f]:'|grep -v 'file'|cut -f2 -d:|cut -f1-6 -d' '|tr -s ' '|tr '\t' ' '|sed 's/ $//g'|sed 's/ /\\x/g'|paste -d '' -s |sed 's/^/"/'|sed 's/$/"/g'
    gunslinger_ · 2010-07-11 15:44:48 4
  • The output is only partial because runtime dependencies should count in also commands executed via system() and libraries loaded with dlopen(), but at least it gives an idea of what a package directly links to. Note: this is meaningful *only* if you're using -Wl,--as-needed in your LDFLAGS, otherwise it'll bring you a bunch of false positives. Show Sample Output


    2
    qlist --exact "$pkg" | sudo scanelf --needed --quiet --format '%n#F' | tr ',' '\n' | sort -u | qfile --from -
    Flameeyes · 2010-07-06 14:39:15 0
  • using cat WAR_AND_PEACE_By_LeoTolstoi.txt | tr -cs "[:alnum:]" "\n"| tr "[:lower:]" "[:upper:]" | sort -S16M | uniq -c |sort -nr | cat -n | head -n 30 ("sort -S1G" - Linux/GNU sort only) will also do the job but as some drawbacks (caused by space/time complexity of sorting) for bigger files... Show Sample Output


    11
    cat WAR_AND_PEACE_By_LeoTolstoi.txt | tr -cs "[:alnum:]" "\n"| tr "[:lower:]" "[:upper:]" | awk '{h[$1]++}END{for (i in h){print h[i]" "i}}'|sort -nr | cat -n | head -n 30
    cp · 2010-07-05 06:39:20 5
  • This command will format your alias or function to a single line, trimming duplicate white space and newlines and inserting delimiter semi-colons, so it continues to work on a single line. Show Sample Output


    5
    goclf() { type "$1" | sed '1d' | tr -d "\n" | tr -s '[:space:]'; echo }
    meathive · 2010-06-26 21:44:17 0
  • This will get the mac address of the eth0 and change lowercase to uppercase. The sed command removed the colons.


    -3
    ifconfig eth0 | grep 'HWaddr' | awk '{print $5}' | tr 'a-z' 'A-Z' | sed -e 's/://g'
    minigeek · 2010-06-26 05:35:03 0
  • Simple bash/ksh/sh command to rename all files from lower to upper case. If you want to do other stuff you can change the tr command to a sed or awk... and/or change mv to cp....


    1
    for n in * ; do mv $n `echo $n | tr '[:lower:]' '[:upper:]'`; done
    max_allan · 2010-06-25 19:20:04 3
  • Generates a random 8-character password that can be typed using only the left hand on a QWERTY keyboard. Useful to avoid taking your hand off of the mouse, especially if your username is left-handed. Change the 8 to your length of choice, add or remove characters from the list based on your preferences or kezboard layout, etc.


    6
    </dev/urandom tr -dc '12345!@#$%qwertQWERTasdfgASDFGzxcvbZXCVB' | head -c8; echo ""
    TexasDex · 2010-06-17 19:30:36 0
  • add integers from the stdin and print out the result usually, cat /tmp/file | echo $(($(tr '\n' '+')0)) Show Sample Output


    1
    echo $(($(tr '\n' '+')0))
    whiskybar · 2010-06-01 18:42:39 0
  • ‹ First  < 5 6 7 8 9 >  Last ›

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: