You can use md5sum command to compute and check MD5 message digest. This is a default tool on most modern Linux distributions. It generate a md5 hash for given string or words or filenames.
Create a md5 string using md5sum command
Use the following syntax:
echo -n "Your-String-Here" | md5sum |
In this example create a md5 hash for wpblog string that can be used by memcached server
echo -n "wpblog" | md5sum |
Sample outputs:
6afedb7a8348eb4ebdbe0c77ef92db4c -
You can store the same in a bash shell variable called hash as follows:
md5="set-string-here" hash="$(echo -n "$md5" | md5sum )" echo "$hash" |
Recommended readings
- See md5sum man page for more information.
11 comment
Reading from standard input:
$ md5sum –
a little script:
#!/bin/bash
echo $1
echo $1 | md5sum
$ ./md5 hallo
hallo
aee97cb3ad288ef0add6c6b5b5fae48a –
The “-” declares, that this message comes from standard input
greets
Beware this script! You should use the “-n” option for echo as shown in the main article. Otherwise, a newline is appended to the output of the echo command and your hash will not be as advertised (unless you really want the newline).
#!/bin/bash
echo $1
echo -n $1 | md5sum
$ ./md5 hallo
hallo
598d4c200461b81522a3328565c25f7c –
Not “aee97cb3ad288ef0add6c6b5b5fae48a” as shown above.
If your hash contains a “–” at the end. Well, seriously this is not correct. I suggest you use this command instead to get rid of that character.
echo -n "samplestring" | md5sum | cut -d"-" -f1 -Remember that md5 should only used for file hash now, in recent days linked_in had a major password leakage for using md5…
md5 and password leaked.
You’re an idiot mate
Thanks, i’ll write this on my tombstone!
I love this site – it’s got more simple, helpful tips for *Nix amateurs (like me!) than I’ve ever seen elsewhere. But, for the life of me, I can’t find a site search anywhere. I was looking for this page, because I’d forgotten the syntax to generate an encrypted password. What’s up with no site search…? If I wanted to search Google, I’d search Google. Anyway, thanks for all of the help. Great site.
Unfortunately, this command creates completely wrong MD5 hashes under certain circumstances, for example if the string to be hashed contains both uppercase and lowercase letters or symbols.
Let’s take the string “8FdBd35E” as an example. Its correct MD5 hash is
2a6b2d4c5fbd87fd896177a8fd12d4d1
and PHP indeed creates the correct MD5 hash:
[email protected] [~]# php -r “echo md5(‘8FdBd35E’);” | xargs echo
2a6b2d4c5fbd87fd896177a8fd12d4d1
However, the “md5sum” shell command creates a completely different MD5 hash:
[email protected] [~]# echo “8FdBd35E” | md5sum
bf84cb9630c7748d0f337c98c2644051 –
Also, checked it with thousands other strings and md5sum creates an incorrect MD5 hash, so the command is not to be trusted.
again, the add -n to remove the newline
echo -n "8FdBd35E" | md5sum => 2a6b2d4c => 2a6b2d4c5fbd87fd896177a8fd12d4d1php -r "echo md5('8FdBd35E');" | xargs echo => 2a6b2d4c5fbd87fd896177a8fd12d4d1
That’s because ‘echo’ appends a newline. I tried your command with the ‘-n’ option and it worked as expected.
username=user
password=passwd
hash_user="$(echo -n "$username" | md5sum )"hash_pass="$(echo -n "$password" | md5sum )"
así me funciono gracias a tu post.
hash_username=$(echo $hash_user | sed 's/ //g' | sed 's/-//g')hash_username=$(echo $hash_pass | sed 's/ //g' | sed 's/-//g')