Commands using tr (349)
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Obviously, you can replace 'man' command with any command in this command line to do useful things. I just want to mention that there is a way to list all the commands which you can execute directly without giving fullpath. Normally all important commands will be placed in your PATH directories. This commandline uses that variable to get commands. Works in Ubuntu, will work in all 'manpage' configured *nix systems. Show Sample Output
4find `echo "${PATH}" | tr ':' ' '` -type f | while read COMMAND; do man -f "${COMMAND##*/}"; done -
I use this as an alias: alias authplain "printf '\!:1\0\!:1\0\!:2' | mmencode | tr -d '\n' | sed 's/^/AUTH PLAIN /'" then.. # authplain someuser@somedomain.com secretpassword AUTH PLAIN c29tZXVzZXJAc29tZWRvbWFpbi5jb20Ac29tZXVzZXJAc29tZWRvbWFpbi5jb20Ac2VjcmV0cGFzc3dvcmQ= # Show Sample Output
4printf '\!:1\0\!:1\0\!:2' | mmencode | tr -d '\n' | sed 's/^/AUTH PLAIN /' -
This is similar to how you would generate a file with all zeros
dd if=/dev/zero of=allzeros bs=1024 count=2k4tr '\000' '\377' < /dev/zero | dd of=allones bs=1024 count=2k -
Use if you have pictures all over the place and you want to copy them to a central location Synopsis: Find jpg files translate all file names to lowercase backup existing, don't overwrite, preserve mode ownership and timestamps copy to a central location
4find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=numbered -dp -u --target-directory {location} & -
4cat file | tr '\n' ''
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Prepending env LC_CTYPE=C fixes a problem with bad bytes in /dev/urandom on Mac OS X
4env LC_CTYPE=C tr -dc "a-zA-Z0-9-_\$\?" < /dev/urandom | head -c 10 -
the speed is about 500MB/s on my machine. i think it's fast enough to output not too many bytes. while a C program may output 1GB per sencond on my machine. if the size is not the power of 512,you may change the bs and count in dd. Show Sample Output
4tr '\0' '\377' < /dev/zero|dd count=$((<bytes>/512)) -
Capitalize first letter of each word in a string. Show Sample Output
4echo 'fOo BaR' | tr '[A-Z]' '[a-z]' | sed 's/\(^\| \)\([a-z]\)/\1\u\2/g' -
4tr a-zA-Z A-Za-z < input.txt
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pyt 'Stairway to heaven - Led Zeppelin' pyt 'brain damage - Pink Floyd' No web browser or even X needed. Just a cli and internet connection! mplayer is pauseable and can skip ahead This may break if youtube changes their search html.
4pyt() { id=$(curl -s 'https://www.youtube.com/results?search_query='$(tr ' ' + <<<"$1") | grep -om3 '"[[:alnum:]]\{11\}"' | awk NR==3 | tr -d \"); youtube-dl -q 'https://www.youtube.com/watch?v='"$id" -o - | mplayer -vo null /dev/fd/3 3<&0 </dev/tty; } -
Should work even when very large files exist.
4tree -isafF /var|grep -v "/$"|tr '[]' ' '|sort -k1nr|head -
Creates one letter folders in the current directory and moves files with corresponding initial in the folder.
4for 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 -
Same as above, but modified to show human readable output Show Sample Output
4tree -ihafF /var | tr '[]' ' '| sort -k1hr|head -10 -
google has added 2 more netblocks... Show Sample Output
4for NETBLOCK in $(echo _netblocks.google.com _netblocks2.google.com _netblocks3.google.com); do nslookup -q=TXT $NETBLOCK ; done | tr " " "\n" | grep ^ip[46]: | cut -d: -f2- | sort -
queries local memcached for stats, calculates hit/get ratio and prints it out. Show Sample Output
3echo -en "stats\r\n" "quit\r\n" | nc localhost 11211 | tr -s [:cntrl:] " "| cut -f42,48 -d" " | sed "s/\([0-9]*\)\s\([0-9]*\)/ \2\/\1*100/" | bc -l -
And then to complete the task: Go to target host;
ssh hostTurn everything off:for i in `chkconfig --list | fgrep :on | awk '{print $1}'` ; do chkconfig --level 12345 $i off; doneCreate duplicate config:while read line; do chkconfig --level $line on; done < foo3chkconfig --list | fgrep :on | sed -e 's/\(^.*\)*0:off/\1:/g' -e 's/\(.\):on/\1/g' -e 's/.:off//g' | tr -d [:blank:] | awk -F: '{print$2,$1}' | ssh host 'cat > foo' -
Note you have also the --xml option ;) Show Sample Output
3svn log | tr -d '\n' | sed -r 's/-{2,}/\n/g' | sed -r 's/ \([^\)]+\)//g' | sed -r 's/^r//' | sed -r "s/[0-9]+ lines?//g" | sort -g -
Generates password consisting of alphanumeric characters, defaults to 16 characters unless argument given. Show Sample Output
3randpw(){ < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;} -
Ping sweep without NMAP
3for i in `seq 1 255`; do ping -c 1 10.10.10.$i | tr \\n ' ' | awk '/1 received/ {print $2}'; done -
Remove CR LF (CRLF) from a text file. use man:tr to get more info about removing other characters from a file. and even character to character replacements.
3tr -d '\r\n' < input_file.txt > output_file.txt -
3cat /proc/$(lsof -ti:8888)/cmdline | tr "\0" " "
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3tr '\t' '\n' < inputfile
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3echo StrinG | tr '[:upper:]' '[:lower:]'
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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 | md5sumAnd 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=2kHope someone finds this useful! :) Cheers, - Gliktch Show Sample Output3tr '\000' '\377' < /dev/zero | dd bs=512 count=200000 status=noxfer | pipebench | sudo dd of=/dev/sdx -
3du --max-depth=1|sort -n|cut -f2|tr '\n' '\0'|xargs -0 du -sh 2>/dev/null
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