How can I transfer SCO accounts (passwd information) to Linux?

If the SCO passwd file has the encrypted password in its second field (in other words, the system isn't using /etc/shadow), then this simple script will work:



 IFS=":"
 cat scopasswdfile | while read line
 do
 set $line
 useradd -c $5 -p $2 -s /bin/bash -d /home/$1 -m $1
 done
 

This requires a current version of "useradd"; the older versions don't take encrypted passwords with -p

Normally, however, the encrypted passwords will be in /etc/shadow. This needs a little more work:

 sort scopasswd > /tmp/p1
 sort scoshadow > /tmp/p2
 join -t: /tmp/p1 /tmp/p2 > /tmp/pscopass
 IFS=":"
 cat /tmp/pscopass | while read line
 do
 set $line
 useradd -c $5 -p $8 -s /bin/bash -d /home/$1 -m $1
 done
 

Note that only the first 13 characters in the non-shadow passwd file are the encrypted password; the rest (stuff after the comma) is for password aging: see "man F passwd".

J.P. Radley abserved: "it be easier to ditch the shadow file and reconstruct it, by running pwunconv, grabbing a copy of /etc/passwd, then running pwconv?".

maximum uid

If converting from SCO to Linux and you desire to retain user id's, you need to be aware of these files.

For SCO, it's etc/default/accounts and etc/default/authsh.

On Linux, the file is /etc/login.defs:

#
# Min/max values for automatic uid selection in useradd
#
UID_MIN			 1000
UID_MAX			60000
# System accounts
#SYS_UID_MIN		  100
#SYS_UID_MAX		  999

#
# Min/max values for automatic gid selection in groupadd
#
GID_MIN			 1000
GID_MAX			60000
# System accounts
#SYS_GID_MIN		  100
#SYS_GID_MAX		  999
 

There are many options in there that are not comonly set; you should review what you can control there.



Got something to add? Send me email.





(OLDER) <- More Stuff -> (NEWER)    (NEWEST)   

Printer Friendly Version

->
-> How can I transfer SCO Unix accounts (passwd information) to Linux?

2 comments



Increase ad revenue 50-250% with Ezoic


More Articles by

Find me on Google+

© Tony Lawrence







Tue May 3 19:14:38 2005: 434   anonymous


do we need to decode the password? thanks



Tue May 3 19:41:40 2005: 435   TonyLawrence

gravatar
No. The script should work as is.



------------------------
Kerio Samepage


Have you tried Searching this site?

Support Rates

This is a Unix/Linux resource website. It contains technical articles about Unix, Linux and general computing related subjects, opinion, news, help files, how-to's, tutorials and more.

Contact us





As soon as an Analytical Engine exists, it will necessarily guide the future course of the science. Whenever any result is sought by its aid, the question will then arise — by what course of calculation can these results be arrived at by the machine in the shortest time? (Charles Babbage)





This post tagged:

FAQ