Trying to generate random password characters into a file
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0
down vote
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I want to generate 100 files with 100 random passwords in /mnt/mymnt/passwords using a script creating some directories.
Even if i try to use cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 30 | head -n 1 > some_random_file.txt the process just does not stop, anyone has any idea why?
shell scripting password
asked Nov 19 at 16:54
C. Cristi
1647
add a comment |
up vote
0
down vote
favorite
I want to generate 100 files with 100 random passwords in /mnt/mymnt/passwords using a script creating some directories.
Even if i try to use cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 30 | head -n 1 > some_random_file.txt the process just does not stop, anyone has any idea why?
shell scripting password
asked Nov 19 at 16:54
C. Cristi
1647
@JeffSchaller uh yeah, fold, sorry and "tr" too
– C. Cristi
Nov 19 at 16:59
@KamilMaciorowski it worked but it stopped inserting passwords after the first file, and I don't get why
– C. Cristi
Nov 19 at 17:10
On a Side note:Next time Give a try to crunch. That would be much easier than writing a script but If you are into learning rather than achieving some task, writing script is Cool :)
– C0deDaedalus
Nov 20 at 4:00
Using openssl to generate the random value may help. Take a look at "openssl rand -hex 32" for example.
– mrflash818
2 days ago
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I want to generate 100 files with 100 random passwords in /mnt/mymnt/passwords using a script creating some directories.
Even if i try to use cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 30 | head -n 1 > some_random_file.txt the process just does not stop, anyone has any idea why?
shell scripting password
asked Nov 19 at 16:54
C. Cristi
1647
I want to generate 100 files with 100 random passwords in /mnt/mymnt/passwords using a script creating some directories.
Even if i try to use cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 30 | head -n 1 > some_random_file.txt the process just does not stop, anyone has any idea why?
shell scripting password
shell scripting password
asked Nov 19 at 16:54
C. Cristi
1647
asked Nov 19 at 16:54
C. Cristi
1647
edited 2 days ago
asked Nov 19 at 16:54
C. Cristi
1647
asked Nov 19 at 16:54
C. Cristi
1647
asked Nov 19 at 16:54
C. Cristi
1647
1647
@JeffSchaller uh yeah, fold, sorry and "tr" too
– C. Cristi
Nov 19 at 16:59
@KamilMaciorowski it worked but it stopped inserting passwords after the first file, and I don't get why
– C. Cristi
Nov 19 at 17:10
On a Side note:Next time Give a try to crunch. That would be much easier than writing a script but If you are into learning rather than achieving some task, writing script is Cool :)
– C0deDaedalus
Nov 20 at 4:00
Using openssl to generate the random value may help. Take a look at "openssl rand -hex 32" for example.
– mrflash818
2 days ago
add a comment |
@JeffSchaller uh yeah, fold, sorry and "tr" too
– C. Cristi
Nov 19 at 16:59
@KamilMaciorowski it worked but it stopped inserting passwords after the first file, and I don't get why
– C. Cristi
Nov 19 at 17:10
On a Side note:Next time Give a try to crunch. That would be much easier than writing a script but If you are into learning rather than achieving some task, writing script is Cool :)
– C0deDaedalus
Nov 20 at 4:00
Using openssl to generate the random value may help. Take a look at "openssl rand -hex 32" for example.
– mrflash818
2 days ago
@JeffSchaller uh yeah, fold, sorry and "tr" too
– C. Cristi
Nov 19 at 16:59
@JeffSchaller uh yeah, fold, sorry and "tr" too
– C. Cristi
Nov 19 at 16:59
@KamilMaciorowski it worked but it stopped inserting passwords after the first file, and I don't get why
– C. Cristi
Nov 19 at 17:10
@KamilMaciorowski it worked but it stopped inserting passwords after the first file, and I don't get why
– C. Cristi
Nov 19 at 17:10
On a Side note: Next time Give a try to crunch. That would be much easier than writing a script but If you are into learning rather than achieving some task, writing script is Cool :)– C0deDaedalus
Nov 20 at 4:00
On a Side note: Next time Give a try to crunch. That would be much easier than writing a script but If you are into learning rather than achieving some task, writing script is Cool :)– C0deDaedalus
Nov 20 at 4:00
Using openssl to generate the random value may help. Take a look at "openssl rand -hex 32" for example.
– mrflash818
2 days ago
Using openssl to generate the random value may help. Take a look at "openssl rand -hex 32" for example.
– mrflash818
2 days ago
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
accepted
I would do it in the following way:
#!/bin/bash
for i in {1..100}
do
cat /dev/urandom | tr -dc '_A-Za-z0-9' | head -c${1:-32} > Password$i
done
answered Nov 19 at 18:46
Michael Prokopec
43711
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Too many hyphens in the tr character set:tr -dc '_A-Za-z0-9'and you can replace the letters and numbers with a character class:tr -dc '_[:alnum:]'
– glenn jackman
Nov 19 at 18:58
yours is wrong i think
– C. Cristi
Nov 20 at 16:47
/dev/urandom uses su or sudo, so the script needs to be run as such. Works on my computer running Debian 9. I see it can be condensed. Thanks glenn!
– Michael Prokopec
2 days ago
Fixed my error. Can now be ran as normal user also. Forgot cat and one pipe, memory not as good as I thought. :( @C.Cristi
– Michael Prokopec
2 days ago
I believe that your shell syntax is off a bit. Look at adding some parentheses and replacing the last|with>.
– G-Man
2 days ago
|
show 4 more comments
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
I would do it in the following way:
#!/bin/bash
for i in {1..100}
do
cat /dev/urandom | tr -dc '_A-Za-z0-9' | head -c${1:-32} > Password$i
done
answered Nov 19 at 18:46
Michael Prokopec
43711
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Too many hyphens in the tr character set:tr -dc '_A-Za-z0-9'and you can replace the letters and numbers with a character class:tr -dc '_[:alnum:]'
– glenn jackman
Nov 19 at 18:58
yours is wrong i think
– C. Cristi
Nov 20 at 16:47
/dev/urandom uses su or sudo, so the script needs to be run as such. Works on my computer running Debian 9. I see it can be condensed. Thanks glenn!
– Michael Prokopec
2 days ago
Fixed my error. Can now be ran as normal user also. Forgot cat and one pipe, memory not as good as I thought. :( @C.Cristi
– Michael Prokopec
2 days ago
I believe that your shell syntax is off a bit. Look at adding some parentheses and replacing the last|with>.
– G-Man
2 days ago
|
show 4 more comments
up vote
0
down vote
accepted
I would do it in the following way:
#!/bin/bash
for i in {1..100}
do
cat /dev/urandom | tr -dc '_A-Za-z0-9' | head -c${1:-32} > Password$i
done
answered Nov 19 at 18:46
Michael Prokopec
43711
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Too many hyphens in the tr character set:tr -dc '_A-Za-z0-9'and you can replace the letters and numbers with a character class:tr -dc '_[:alnum:]'
– glenn jackman
Nov 19 at 18:58
yours is wrong i think
– C. Cristi
Nov 20 at 16:47
/dev/urandom uses su or sudo, so the script needs to be run as such. Works on my computer running Debian 9. I see it can be condensed. Thanks glenn!
– Michael Prokopec
2 days ago
Fixed my error. Can now be ran as normal user also. Forgot cat and one pipe, memory not as good as I thought. :( @C.Cristi
– Michael Prokopec
2 days ago
I believe that your shell syntax is off a bit. Look at adding some parentheses and replacing the last|with>.
– G-Man
2 days ago
|
show 4 more comments
up vote
0
down vote
accepted
up vote
0
down vote
accepted
I would do it in the following way:
#!/bin/bash
for i in {1..100}
do
cat /dev/urandom | tr -dc '_A-Za-z0-9' | head -c${1:-32} > Password$i
done
answered Nov 19 at 18:46
Michael Prokopec
43711
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I would do it in the following way:
#!/bin/bash
for i in {1..100}
do
cat /dev/urandom | tr -dc '_A-Za-z0-9' | head -c${1:-32} > Password$i
done
answered Nov 19 at 18:46
Michael Prokopec
43711
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
answered Nov 19 at 18:46
Michael Prokopec
43711
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Nov 19 at 18:46
Michael Prokopec
43711
answered Nov 19 at 18:46
Michael Prokopec
43711
43711
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Michael Prokopec is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Too many hyphens in the tr character set:tr -dc '_A-Za-z0-9'and you can replace the letters and numbers with a character class:tr -dc '_[:alnum:]'
– glenn jackman
Nov 19 at 18:58
yours is wrong i think
– C. Cristi
Nov 20 at 16:47
/dev/urandom uses su or sudo, so the script needs to be run as such. Works on my computer running Debian 9. I see it can be condensed. Thanks glenn!
– Michael Prokopec
2 days ago
Fixed my error. Can now be ran as normal user also. Forgot cat and one pipe, memory not as good as I thought. :( @C.Cristi
– Michael Prokopec
2 days ago
I believe that your shell syntax is off a bit. Look at adding some parentheses and replacing the last|with>.
– G-Man
2 days ago
|
show 4 more comments
2
Too many hyphens in the tr character set:tr -dc '_A-Za-z0-9'and you can replace the letters and numbers with a character class:tr -dc '_[:alnum:]'
– glenn jackman
Nov 19 at 18:58
yours is wrong i think
– C. Cristi
Nov 20 at 16:47
/dev/urandom uses su or sudo, so the script needs to be run as such. Works on my computer running Debian 9. I see it can be condensed. Thanks glenn!
– Michael Prokopec
2 days ago
Fixed my error. Can now be ran as normal user also. Forgot cat and one pipe, memory not as good as I thought. :( @C.Cristi
– Michael Prokopec
2 days ago
I believe that your shell syntax is off a bit. Look at adding some parentheses and replacing the last|with>.
– G-Man
2 days ago
2
2
Too many hyphens in the tr character set:
tr -dc '_A-Za-z0-9' and you can replace the letters and numbers with a character class: tr -dc '_[:alnum:]'– glenn jackman
Nov 19 at 18:58
Too many hyphens in the tr character set:
tr -dc '_A-Za-z0-9' and you can replace the letters and numbers with a character class: tr -dc '_[:alnum:]'– glenn jackman
Nov 19 at 18:58
yours is wrong i think
– C. Cristi
Nov 20 at 16:47
yours is wrong i think
– C. Cristi
Nov 20 at 16:47
/dev/urandom uses su or sudo, so the script needs to be run as such. Works on my computer running Debian 9. I see it can be condensed. Thanks glenn!
– Michael Prokopec
2 days ago
/dev/urandom uses su or sudo, so the script needs to be run as such. Works on my computer running Debian 9. I see it can be condensed. Thanks glenn!
– Michael Prokopec
2 days ago
Fixed my error. Can now be ran as normal user also. Forgot cat and one pipe, memory not as good as I thought. :( @C.Cristi
– Michael Prokopec
2 days ago
Fixed my error. Can now be ran as normal user also. Forgot cat and one pipe, memory not as good as I thought. :( @C.Cristi
– Michael Prokopec
2 days ago
I believe that your shell syntax is off a bit. Look at adding some parentheses and replacing the last
| with >.– G-Man
2 days ago
I believe that your shell syntax is off a bit. Look at adding some parentheses and replacing the last
| with >.– G-Man
2 days ago
|
show 4 more comments
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@JeffSchaller uh yeah, fold, sorry and "tr" too
– C. Cristi
Nov 19 at 16:59
@KamilMaciorowski it worked but it stopped inserting passwords after the first file, and I don't get why
– C. Cristi
Nov 19 at 17:10
On a Side note:Next time Give a try to crunch. That would be much easier than writing a script but If you are into learning rather than achieving some task, writing script is Cool :)– C0deDaedalus
Nov 20 at 4:00
Using openssl to generate the random value may help. Take a look at "openssl rand -hex 32" for example.
– mrflash818
2 days ago