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Unit 11: User Accounts

cash vending machines notes
Another powerful feature is e-transfer of money using the prepaid coupons by any land
line or mobile phone, from anywhere to any client account.
Cash vending machines, identical to ATMs but featuring an STB, and provided by the
system provider at franchisee points will deliver real cash to MTM users.

The system technology is identical to the pre-paid system and uses the mobile network and
switching systems for access, but its function is transparent to the latter. The whole idea is
to make the micro-payment banking facility available, accessible and affordable for people
at the lower end of the economic strata across the country.
excess Liquidity

The proposed system will be an exclusive technology-oriented mobile banking system that
is transparent to mobile service providers, banks or other financial architecture owned by
the Government.

Since MTM deals amount to being virtual e-transactions, most of the real money remains
within the MTM system.
The huge excess liquidity available with MTM owner can be profitably deployed in various
banking products, subject to regulatory norms.
Source: http://www.thehindubusinessline.in/2010/11/02/stories/2010110252550700.htm

11.4 summary

Under Linux (and other Unixish oses) you use command called su. It is used is used to become
another user during a login session or to login as super user. One of the most important activities
in administering a Linux box is the addition of users. Here you’ll find some simple examples
to provide a foundation for future chapters. It is not intended to be comprehensive, but is a
good memory refresher. The sudo utility allows users defined in the /etc/sudoers configuration
file to have temporary access to run commands they would not normally be able to due to file
permission restrictions. Sometimes you’ll need to assign random groupings of users from various
departments very similar sets of privileges.

11.5 keywords

Normal User: A “normal user” will be assigned some of these capabilities based on what group
they are in, but is generally prevented from running any commands that may affect the system
outside of their home directory.
Super User: The super user with unrestricted access to all system resources and files in Linux is
the user named root.

Setuid and Setgid: setuid and setgid are Linux access rights flags that allow users to run an
executable with the permissions of the executable’s owner or group.

11.6 self assessment

Fill in the blanks:

1. One of the most important activities in ..................... a Linux box is the addition of users.
2. When each new user first logs in, they are prompted for their new ..................... password.
3. The ..................... command is used to remove the user’s record from the /etc/passwd and
/etc/shadow used in the login process.

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