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Solaris UNIX: Change Default Shell

How do I change default ksh shell to bash shell under Solaris / OpenSolaris UNIX operating system using command line options?
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Can you tell me more about unshadow and john command line tools? How does it protect my server from crackers?
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Q. How do I use htpasswd command to store username and passwords?

A. htpasswd is used to create and update the flat-files used to store usernames and password for basic authentication of HTTP users. If htpasswd cannot access a file, such as not being able to write to the output file or not being able to read the file in order to update it, it returns an error status and makes no changes.

Create a new password file

Following command will creates a new file and stores a record in it for user jerry. The user is prompted for the password. If the file exists and cannot be read, or cannot be written, it is not altered and htpasswd will display a message and return an error status.
# htpasswd -c /home/pwww/.htpasswd jerry

Change or update password

To add or modifies the password for user tom, enter:
# htpasswd /home/pwww/.htpasswd-users tom

The user is prompted for the password.

See previous FAQ : Apache password protect directories with .htaccess file for more examples.

Linux Set or Change User Password

How do I set or change Linux system password for any user account?
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How do I Telnet as the Root User?

Q. How do I telnet as the root user?
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How do I use tar command over secure ssh session?
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