Random password generator – Losowe generowanie haseł

Random Password generator – let’s generate the password from within the urandom mess….

For the beginning let’s issue the following command (cancel it by Ctrl+c !!):

$cat /dev/urandom

It shows us, where the script takes its random strings from, further used for the password generation

• As a result of below command will be 5 lines of printed marks:

< /dev/urandom tr -cd '[:graph:]' | fold -w 8 | head -n 5

• in result of the following command we’ll get 5 lines of letters:

< /dev/urandom tr -cd '[:alpha:]' | fold -w 8 | head -n 5

• below example returns letters + digits which are alphanumeric marks – x lines:

< /dev/urandom tr -cd '[:alnum:]' | fold -w 8 | head -n x # x - number of returned lines for ex.: 100

Quick “tr” How To:

# alnum # alpha # blank # cntrl # digit # graph # lower # print # punct # space # upper # xdigit

– Letters numbers – Letters – levels white mark? – control marks – digits – printed marks, excluding spaces – lower case – printed marks including spaces – punctuation mark – vertical or horizontal white mark (space) – upper case – HEX digits