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You are on a system in which the finger program has been disabled and you want a quicky finger type program and you decide that greping/etc/passwd would be sufficient.
However the system that you are on uses nis+ and so nothing is in the password file. In order to essentially get the contents of the password file you can execute niscat passwd.org_dir
. Thus you decide to write a C program, myfinger, that will execute niscat passwd.org_dir and then pipe the stdout of the niscat program into egrep rexp where rexp is the regular expression given on the command line.
Write the myfinger program which can then be used, for example, to find information about a user named George by executing: myfinger George.
Describe a way of traversing an orchard that will visit the vertices in the same order as postorder traversal of the corresponding binary tree.
most operating systems use a virtual memory manager vmm whose responsibility is to manage the relationship between the
A computer system has a word addressable memory. Each word is 32 bits (4 bytes) wide, and sytem uses 24-bit addressing. How many memory locations can be addressed?
An incandescent light bulb is an inexpensive but highly inefficient device that converts electrical energy into light.
Suppose you need to manually sort a hand of cards. What techniques, other than a bubble sort, would you implement?
questionyou are working on a project to increase an intranet and several people are confused about who requests to do
The gas turbine blade of Prob. I is to be cooled to a uniform surface temperature of 650°C by transpiration of air through a porous surface.
Implement wildcard pattern matching with support for '?' and '*'. '?' : Matches any single character. '*' : Matches any sequence of characters.
Why do systems deployments or implementations succeed.
A vertical 1.5-m-high and 3.0-m-wide enclosure consists of two surfaces separated by a 0.4-m air gap at atmospheric pressure.
discuss why data structure is useful and important in programing. use your own examples to explain what an array is
Using a lab system, find and apply all operating system patches. Check with all vendors of software installed on that machine and apply patches.
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