zen barcode c# example > -create /Local/Default/Users/corpadmin UserShell /bin/bash in Objective-C

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> -create /Local/Default/Users/corpadmin UserShell /bin/bash
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Every user needs a home directory. Even the root account has one (/var/root by default). The home directory doesn t need to reference a path that currently exists as the first time the user logs into a system the home directory will be created and assigned appropriate permissions. The attribute for the home directory is NFSHomeDirectory:
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> -create /Local/Default/Users/corpadmin NFSHomeDirectory /Users/corpadmin
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Because we re creating an administrative user, we also need to add the account to the admin group. Here, we ll use the append dscl command rather than create because we re augmenting an existing key rather than creating one. We ll follow it with the relative path of the admin group and then the attribute that we ll be editing and finally
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CHAPTER 1: Directory Services
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the payload of the actual edit. To add the corpadmin user to the administrative users group:
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> -append /Local/Default/Groups/admin GroupMembership corpadmin
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TIP: If you know the value of an attribute, it is best to use the -merge option here; if you don t, you can use -append.
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Next you ll give your new user a password using the passwd option, typing a password once the following command is run:
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> -passwd /Local/Default/Users/corpadmin
By now, the account should be listed in the local directory service. To make sure, we ll use the -list option:
> -list /Local/Default/Users
Once the account has been recognized by the local directory services node, you can look at information that was not in the original property list, such as the GeneratedUID, using dscl:
> -read /Local/Default/Users/corpadmin GeneratedUID
The dscl command is also very useful in troubleshooting. In the above command we were looking for a specific attribute, but if we wanted to see all of the attributes for our new corpadmin account we could simply run the following:
> -read /Local/Default/Users/corpadmin
Changing Accounts En Masse
If you have ssh or Apple Remote Desktop (ARD) access, you can push out a variety of changes to an account. Once an account has been created, any of the attributes can be changed en masse, using dscl. For example, if you wanted to reset the corpadmin password to MYSECRETPASSWORD, the following command could be sent to each machine in your enterprise:
sudo dscl . -passwd /Users/corpadmin MYSECRETPASSWORD
NOTE: If you change the password as a non-administrative user, you need to enter the actual user s password to do so.
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CHAPTER 1: Directory Services
Or if you wanted to move the user s home folder into the /var directory (so it can live with and be friends with root), you could use the following (assuming you put the original home folder into /Users/corpadmin):
sudo dscl . -change /Users/corpadmin NFSHomeDirectory /Users/corpadmin /var/corpadmin
Notice that in the above command we used the change dscl command rather than edit. Also notice that in both of these examples, we used dscl along with the . operator rather than using dscl interactively. By using the . operator, we ended up with a different relative path to the user record; it is a shortcut to the Local/Default node. The attribute then appears as:
NFSHomeDirectory: /var/corpadmin
Account Creation Scripts
New accounts can also be created using scripts. These scripts will also leverage dscl, along with the . operator (no point in complicating things by trying to script against an interactive command-line environment). To get started, let s create a script called adduser.sh on our desktop, and then take the commands we used in the above section to create our user attributes and put them into a script, replacing the > with dscl . and removing /Local/Default:
#!/bin/bash user="corpadmin" dscl . -create /Users/$user dscl . -create /Users/$user dscl . -create /Users/$user dscl . -create /Users/$user dscl . -create /Users/$user dscl . -create /Users/$user dscl . -passwd /Users/$user
RealName "Corporate Administrator" UniqueID 1100 PrimaryGroupID 20 NFSHomeDirectory /Users/corpadmin UserShell /bin/bash 'MYSECRETPASSWORD'
There is a serious problem with the above script: it has the administrative password in it. To get around this, you can also create an account by copying the authentication files, which contain the hashed password, directly to the client system.
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