What is the result of the following command sequences?
ls | wc -l
rm ???
who | wc -l
mv progs/* /users/steve/backup
ls *.c | wc -l
rm *.o
who | sort
cd; pwd
cp memo1 ..
plotdata 2>errors &
ls | wc -l
Shows how many files are in the current directory
rm ???
Removes any files that have exactly three character names
who | wc -l
Shows how many people are logged into the system
mv progs/* /users/steve/backup
Moves all files from progs into /users/steve/backup
ls *.c | wc -l
Shows how many C programs (files with a .c filename suffix) are in the current directory
rm *.o
Removes any files that have a .o filename suffix from the current directory
who | sort
Shows who is logged in, sorted in alphabetical order
cd; pwd
Changes to your default $HOME directory, and shows where you are in the file system
cp memo1 ..
Copies the file memo1 to the parent directory
plotdata 2>errors &
Runs the plotdata command in background, redirecting the stderr output to the file error
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A __________ is a value that signals when the end of a list of values has been reached.
a. terminal b. sentinel c. token d. delimiter
When you are a regular user, where are you positioned when you first log on to CentOS 7 and what permissions do you have?
What will be an ideal response?
A computer with cache built in to the microprocessor plus memory built in to the processor packaging may have additional cache memory on the motherboard called
A) L3 cache B) L2 cache C) L1 cache D) L cache
Sending a packet to all network devices is called a ____ transmission.
A. unicast B. multicast C. broadcast D. singlecast