Explain the following unexpected result:

 

What are two ways you can execute a shell script when you do not have execute permission for the file containing the script? Can you execute a shell script if you do not have read permission for the file containing the script?

What is the purpose of the PATH variable?

a. Set the PATH variable and place it in the environment so it causes the shell to search the following directories in order:

• /usr/local/bin

• /usr/bin

• /bin

• /usr/kerberos/bin

• The bin directory in your home directory

• The working directory

b. If there is an executable file named doit in /usr/bin and another file with the same name in your ~/bin directory, which one will be executed?

c. If your PATH variable is not set to search the working directory, how can you execute a program located there?

d. Which command can you use to add the directory /usr/games to the end of the list of directories in PATH?

S whereis date date: /bin/date... S echo SPATH .:/usr/local/bin:/usr/bin:/bin $ cat > date echo "This is my own version of date." $ ./date Sun May 21 11:45:49 PDT 2017