hello, i am a newbie and i really need your help
i have an centos 6.5 and i wonder if i can create a list with random 4 letters :
gdjf
ornc
tyrn
jfdn
nofd
etc....
if it can be done , i will really apreciate your help ! THANKS !!!
---------- Post updated at 07:16 AM ---------- Previous update was at 07:13 AM ----------
ohhh...i forgot ....
i want to use all letters....all posibilities.....
Any attempts from your side?
no...i dont know how to do it ....i thought there is a scrypt or something
Is it homework?
Withdrawn until DukeNuke2's question is answered...
not really a homework.....i want to have all posibilities for 4 letters wich will help me for another project. a friend of mine told me about this forum....he said you always help...
maybe i didnt explain corectly but i really hope to solve this. thx !
You didn't mention the shell you are using. Anyhow, with a recent bash , try
RD=( {A..Z} {a..z} )
echo ${RD[$((RANDOM%52))]}${RD[$((RANDOM%52))]}${RD[$((RANDOM%52))]}${RD[$((RANDOM%52))]}
jTyG
no...i dont.....
the task looks like this : can you find out how many possibilities are for 4 letters ? and if yes , can you have a list with them ? i am sorry....i never worked with this....a friend told me about this forum and he said you guys helped him alot. thank you !
---------- Post updated at 02:00 PM ---------- Previous update was at 01:59 PM ----------
only small letters.....not capital !
456976
for i in {a..z}; do
for j in {a..z}; do
for k in {a..z}; do
for l in {a..z}; do
echo $i$j$k$l
done
done
done
done
This has nothing to do with *nix: it's the number of chars raised to the power of count of positions: 26 ^ 4 = 456976. Given your specification will not change again, e.g. duplicates allowed in the string, permutations allowed, etc.
If you do only printing...and have enough memory...
printf "%s\n" {a..z}{a..z}{a..z}{a..z}
printf "%s\n" {a..z}{a..z}{a..z}{a..z} | wc -l
456976