barcode generator in vb.net free download # passwd -l natashia in Software

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# passwd -l natashia
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This command would lock natashia s account until the root user once again used the passwd command on this account to set a new password. A locked account can be identified in the password database by the characters LK:
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# grep natashia /etc/shadow natashia:*LK*:::::::
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You can unlock the account by either removing the *LK* entry manually or by setting a password. Once all of the user s files have been backed up, and any active processes have been killed by the superuser, the user account may be permanently deleted by using the userdel command. For example, to delete the user account natashia and remove that user s home directory and all the files underneath that directory, you would use this command:
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# userdel -r natashia
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Or, you could edit both the password and shadow password databases and remove the appropriate lines containing the entries for the user natashia. You would also need to manually remove the user s home directory and all of her files underneath that directory. Note that this procedure works only if the user database is the traditional UNIX local DB it does not work with user DBs like LDAP and NIS/NIS+. There are also several system accounts, including adm, bin, listen, nobody, lp, sys, and uucp, that should remain locked at all times to prevent interactive logins.
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Adding Groups
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To add a new group to the system, you may either manually edit the /etc/group file or use the groupadd command, which has the following syntax:
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/usr/sbin/groupadd -g gid
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group_name
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Thus, to add a group called managers to the system, with a GID of 500, you would use this command:
# groupadd -g 500 managers
You would then be able to verify the new group s existence by searching the groups database:
# grep managers /etc/group managers::500:
The groupadd command will fail if the GID that you specify has already been allocated to an existing group or if the group_name is greater than eight characters.
Part III:
Security
Managing Groups
If you want to change your group from primary to secondary during an interactive session to ensure that all the files that you create are associated with the correct GID, you need to use the newgrp command. For example, the root user has the following primary group membership:
# id uid=0(root) gid=0(root)
However, if the root user wishes to act as a member of another group, such as sys, you would have to use the following command:
# newgrp sys
The effective GID would then change to sys:
# id uid=0(root) gid=3(sys)
NOTE If a password is set on the target group, a non-root user would have to enter that
password to change the effective group. Any operations (such as creating files) that the root user performs after using newgrp will be associated with the GID of 3 (sys) rather than 0 (root). For example, if you created a new file with the primary group, the group associated with the new file would be GID 0:
# touch root.txt # ls -l root.txt -rw-r--r-1 root
root
0 Oct 12 11:17 root.txt
However, if the root user then changes groups to sys and creates a new file, the group associated with the file will be sys rather than root:
# newgrp sys # touch sys.txt # ls -l sys.txt -rw-r--r-1 root
0 Oct 12 11:18 sys.txt
Starting the SMC
The SMC operates by collecting data from systems, providing an interface for viewing that data, and allowing administrative tasks to be executed on the basis of that data. Different servers can store localized toolboxes. Alternatively, if a high-resolution graphics card or monitor is not available, then SMC can be started with a command-line interface.
12:
Users, Groups, and the Sun Management Console
The command that starts the SMC is /usr/sadm/bin/smc. This assumes that SMC is to be opened for operations. An alternative mode of operation is provided by the smc edit mode, where toolboxes can be modified or updated. The following options are available to the smc command when starting up: auth-data Allows authentication data to be read from a file.
toolbox Stipulates the name of a toolbox to read in from a file. Alternatively, a URL can be specified that points to the location of a toolbox. domain Designates the domain name for the systems that are being managed. LDAP, DNS, NIS, and NIS+ domains are supported. The form of the URL for a DNS domain cassowary.net and the host midnight would be dns:/midnight/ cassowary.net. hostname:port Nominates the hostname and port number of the server to manage. The default port number is 898. J Passes any command-line options to the Java Virtual Machine, such as the initial and maximum heap sizes. rolepassword password rolename t trust tool yes Specifies a password for the role rolename. Specifies a password for username. Specifies a role to execute SMC.
Executes SMC in terminal mode. Allows all downloaded code to be trusted. Specifies a tool to be executed. Specifies a username with which SMC is to be executed. Answers yes, by default, to all interactive questions.
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