Bash script problem

1.Assume you are editing a C++ file and there are three calls to a function with the following signature:

void myFunction(int x);

The function name has changed, so it is now called:

void my_function(int x);

Please take the following steps to make the necessary changes:

1. Move to the first line in the file from wherever you are (two keystrokes): ______
2. start a forward search: ______
3. Type "myFunction(" and hit <RETURN>
4. Cursor should be at the start of a call to the function.
5. Change from where the cursor is to the '(' character (three keystrokes): ______
6. Type "my_function(" and hit <ESC>
7. Repeat the last search (one keystroke): ______
8. Repeat the last change (one keystroke): ______
9. Repeat the last search (one keystroke): ______
10. Repeat the last change (one keystroke):______

 

2.What flag will cause declare to "export" the variable being defined? 

Notes: 

1. declare is a built-in function, so you will have to look in the man page for BASH for its usage.
2. Testing: once a variable is "exported" it will show up in the output of the env command. env | grep myVa

__________________

 

3.What is the command that will set the variable numErrors equal to the number of lines in the file /var/log/httpd/error_log that contain the string ERROR (case insensitive: Error, error, eRROr, etc. also count)?

numErrors________=  (grep_________  ERROR /var/log/httpd/error_log)

Notes

1. 1st blank is needed for command substitution
2. 2nd blank is the flags needed for grep (include the leading - in your answer)
3. Testing: create a sample file (not in the /var/log/httpd directory) with a known number of lines with different ERROR / error strings.

 

4.What is the command to use if you want to run a script without creating a new process?

Testing: create a script that sets a variable. If you have this right, that variable will be set in the calling shell.

_________________

 

5.What is the special first line of a script that is to be directly executable by the shell?

______________________

 

6.What is the command that will make the script file myScript.sh readable by all users, and writable and executable by the owner?

chmod_________myScript.sh

Notes:

1. use an absolute mode for this question
2. Testing: try some different chmod commands and use ls -l myScript.sh to check the result

 

7.What is the command to print the number of command line arguments? The printed value should be formatted as 3 digits, with zero padding and a trailing newline.

printf "______"__________ 

Notes:

1. 1st blank is the format string
2. 2nd blank is a variable
3. Testing: try it out

 

8.What is the test command to determine if var1 is greater than var2?

[ _______ ____________ __________   ]

Notes

1. 1st blank is a variable
2. 2nd blank is a test argument
3. 3rd blank is a variable
4. Testing try it out

 

9.What is the if-statement that will print a message if Hello.class is older than Hello.java?

if [ Hello.java________Hello.class ]

________________

echo "Hello.class is out of date"

fi

Notes:

1. 1st blank is a test flag
2. 2nd argument is part of the if-statement
3. Testing create a simple script and try it out