Commands using tr (349)
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make password randomly, default 8 char
-1genpass() { local h x y;h=${1:-8};x=( {a..z} {A..Z} {0..9} );y=$(echo ${x[@]} | tr ' ' '\n' | shuf -n$h | xargs);echo -e "${y// /}"; } -
Useful when you need to write e.g. an INSERT for a table with a large number of columns. This command will retrieve the column names and comma-separate them ready for INSERT INTO(...), removing the last comma.
-1mysql -u <user> --password=<password> -e "SHOW COLUMNS FROM <table>" <database> | awk '{print $1}' | tr "\n" "," | sed 's/,$//g' -
A slightly shorter version. Also doesn't put a return character at the end of the password
-1tr -dc 'a-zA-Z0-9' < /dev/urandom | head -c10 -
Get Google Reader unread count from the command line. You'll have to define your auth token with $auth Or use:
curl -s -H "Authorization: GoogleLogin auth=$(curl -sd "Email=$email&Passwd=$password&service=reader" https://www.google.com/accounts/ClientLogin | grep Auth | sed 's/Auth=\(.*\)/\1/')" "http://www.google.com/reader/api/0/unread-count?output=json" | tr '{' '\n' | sed 's/.*"count":\([0-9]*\),".*/\1/' | grep -E ^[0-9]+$ | tr '\n' '+' | sed 's/\(.*\)+/\1\n/' | bcShow Sample Output-1curl -s -H "Authorization: GoogleLogin auth=$auth" "http://www.google.com/reader/api/0/unread-count?output=json" | tr '{' '\n' | sed 's/.*"count":\([0-9]*\),".*/\1/' | grep -E ^[0-9]+$ | tr '\n' '+' | sed 's/\(.*\)+/\1\n/' | bc -
1.) my profile ends with $USER not with .default 2.) only grep for the first occurrence because some extensions have the translated name also inside the install.rdf Show Sample Output
-1grep -hIr -m 1 :name ~/.mozilla/firefox/*.$USER/extensions | tr '<>=' '"""' | cut -f3 -d'"' | sort -u -
with grep for em:name rather than name, you will get much better result. Show Sample Output
-1$grep -hIr -m 1 em:name ~/.mozilla/firefox/*.default/extensions|sed 's#\s*##'|tr '<>=' '"""'|cut -f3 -d'"'|sort -u -
-1wget -qO - http://i18n.counter.li.org/ | grep 'users registered' | sed 's/.*\<font size=7\>//g' | tr '\>' ' ' | sed 's/<br.*//g' | tr ' ' '\0'
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-1ps -eo args,%cpu | grep -m1 PROCESS | tr 'a-z-' ' ' | awk '{print $1}'
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This command deletes the "newline" chars, so its output maybe unusable :)
-1cat file | tr -d "\n" -
a pretty simple script when running java programs from command line Show Sample Output
-1CLASSPATH=.; export CLASSPATH=$CLASSPATH$(find "$PWD" -name '*.jar' -type f -printf ':%p\n' | sort -u | tr -d '\n'); echo $CLASSPATH -
(1) don't run twice, or the same folder will occur in $PATH. (2) otherwise you need to start a new terminal Show Sample Output
-1export PATH=$PATH$(find "$PWD" -name '.*' -prune -o -type f -a -perm /u+x -printf ':%h\n' | sort -u | tr -d '\n'); echo $PATH -
chrome only lets you export in html format, with a lot of table junk, this command will just export the titles of the links and the links without all that extra junk Show Sample Output
-1grep -E '<DT><A|<DT><H3' bookmarks.html | sed 's/<DT>//' | sed '/Bookmarks bar/d' | sed 's/ ADD_DATE=\".*\"//g' | sed 's/^[ \t]*//' | tr '<A HREF' '<a href' -
-1RANGE=`wc -l /usr/share/dict/words | sed 's/^\([0-9]*\) .*$/\1/'`; for i in {1..4}; do let "N = $RANDOM % $RANGE"; sed -n -e "${N}p" /usr/share/dict/words | tr -d '\n'; done; RANGE=100; let "N = $RANDOM % $RANGE"; echo $N
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Doesn't use shuf, its much faster with "shuf -n4" instead of sort -R Show Sample Output
-1sort -R /usr/share/dict/british | grep -v -m4 ^\{1,10\}$ | tr [:upper:] [:lower:] | tr "\n" " " | tr -d "'s" | xargs -0 echo -
Also shows files as they are found. Only works from a tty.
-1echo $(find <directory> -name '*.<extension>' -exec du -s {} \; | tee $(tty) | cut -f1 | tr '\n' '+') 0 | bc -
It will produce passwords with length of 20 printable characters within a reasonable time. For shorter or longer passwords just change the 20 in bs=20 to something more convenient. To create only alpha numeric passwords change [:print:] to [:alnum:] Show Sample Output
-1dd if=/dev/urandom | tr -d -c [:print:] | tr -d " " | dd count=1 bs=20 2> /dev/null; echo -
-1tr '[:upper:]' '[:lower:]' < input.txt > output.txt
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-1echo lowercaseword | tr '[a-z]' '[A-Z]'
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-2guid(){ lynx -nonumbers -dump http://www.famkruithof.net/uuid/uuidgen | grep "\w\{8\}-" | tr -d ' '; }
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-2mount | grep : | tr -s ' ' -d 3 | xargs umount -v
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-2echo "Xc" | tr "Xo" "\033\017
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Does that count as a win for bzip2? Show Sample Output
-2< /dev/urandom tr -dc A-Za-z0-9_ | head -c $((1024 * 1024)) | tee >(gzip -c > out.gz) >(bzip2 -c > out.bz) > /dev/null -
-2echo "12345,12346" |sed -e's/ //'|tr "," "\n"| while read line; do echo -n $line" "; svn log -vr $line https://url/to/svn/repository/|grep "/"|head -1|cut -d"/" -f2; done
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-2find / | xargs ls -l | tr -s ' ' | cut -d ' ' -f 1,3,4,9
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no need that useless cat.
-2tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 10 | sed 1q - ‹ First < 11 12 13 14 >
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