This just a log for me (& may be others) to remind me how to generate random passwords on Linux terminal.
pwgen is a useful command which can generate both pronounceable and secure passwords.
There are a few other creative ways to generate random text/password on linux terminal, but pwgen is specially designed for the task and is the most handy.
The usage is quite simple:
pwgen [ OPTIONS ] [ pw_length ] [ num_pw ]
By default, pwgen generates pronounceable passwords.
For secure password use
The pwgen man page describes more options.
Some example are listed below.
Generate 6 random (pronounceable) passwords of length 20:
$ pwgen 20 6 fei7hohS9co6ahkua2ei chaiFoo2eaLedei9Oosi Ainuu5eehie5ae1eecae co6quahbaiPahSh1good fah6Daer7geepae0teef queeLahl9us7sushawie
Generate 6 random (secure) passwords of length 20.
$ pwgen -s 20 6 PTbQ8Nc8gIJ5sHrKM0gS pMI8R8KK0MrnCd4UCEhe 25KcqpYiQTOFYf7PHwoN ztClxu7CQiOOVPgNJFHa yKnc1obXyXLvmPmLAVWA L1fMNHRRHiC2MNWS6j2Z
Generate 6 random passwords of length 20 with special characters.
$ pwgen -y 20 6 EN5eb2eyuz2ohNgir}ei yah>l9ainohWah8afaiJ Jue-dah3quoo8wee9foh ul)eoWie3Ees;aeh(ees pheehie+Zanahw~eiP5g dath5oozaht0fei&F4Xi
Generate 6 random (secure) passwords of length 20 with special characters.
$ pwgen -s -y 20 6 JSt]pL1UV)`u>Rz%;]Ei yx-sWF#pm_ci?(w|D0pd [#W%%E%oP7vQ~U%?#L<9 :~Y:Z?LH''aHH&A$zJ4w zZ5vZH+ABm!k;S_b^#cb c"zpT6l1HI_"ENSuNAkw
Lastly, here is the pwgen help text:
$ pwgen --help Usage: pwgen [ OPTIONS ] [ pw_length ] [ num_pw ] Options supported by pwgen: -c or --capitalize Include at least one capital letter in the password -A or --no-capitalize Don't include capital letters in the password -n or --numerals Include at least one number in the password -0 or --no-numerals Don't include numbers in the password -y or --symbols Include at least one special symbol in the password -s or --secure Generate completely random passwords -B or --ambiguous Don't include ambiguous characters in the password -h or --help Print a help message -H or --sha1=path/to/file[#seed] Use sha1 hash of given file as a (not so) random generator -C Print the generated passwords in columns -1 Don't print the generated passwords in columns -v or --no-vowels Do not use any vowels so as to avoid accidental nasty words