Need to replace line 1 with 2 in Shell script. I tried so many option but I failed in eache and evary case

1\nuserPrincipalName.+\n)
2\nuserPrincipalName:\1uid:\1

1\nuserPrincipalName.+\n)
2\nkrbPrincipalName:\1

1\nSAMAccountName.+\n)
2\nSAMAccountName:\1sn:\1

1\nSAMAccountName.+\n)
2\norclSAMAccountName:\1

1\ngivenName.+\n)
2\ngivenName:\1displayName:\1

1\nemployeeID.+\n)
2\nemployeeID:\1employeeNumber:\1

1\nobjectClass: organizationalPerson\n
2\nobjectClass: organizationalPerson\nobjectClass: inetorgperson\n

1\nobjectClass: inetorgperson\n
2\nobjectClass: inetorgperson\nobjectClass: orcluser\n

1\nobjectClass: user\n
2\nobjectClass: orcluserV2\n

The Sarrow faces are : actuvally nospace between : and (.+

What are the specifications for replacement?

in line values will populate.

In a single file contains lot of userinformation like given below

ex:

dn: CN=Smith \, David,OU=DCC,OU=OTO,OU=DCS,OU=LAN Configs,DC=ca,DC=ad,DC=sdsdsdsd,DC=com
changetype: add
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: user
cn: smith, David l: mclean title: LAN Specialist
description: DCS/OTO/DCC/CER/IMT
physicalDeliveryOfficeName: CER
telephoneNumber: (XXX) XXX-XXXX
facsimileTelephoneNumber: (XXX) XXX-XXXX
givenName: David
sAMAccountName: 45454545
userPrincipalName: 45454545@ca.ad.sdsdsdsd.com

Sorry, still don't get it... Can you give a literal example of the wanted results based on the file above?

At least Can I replace that particular string 1 with 2 .

I try to use sed , but failed.

Thank you for your support.

Maybe I can help you but then you must be specific in your requirements...