i) Detect the deadlock using wait for graph ii) Find out the solution to recover from this deadlock
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A: Find the answer given as below:
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- Suppose Alice has r and w rights over the file book. Alice wants to copy r rights to book to Bob. Assuming there is a copy right c, write a command to do this. Now assume the system supports a copy flag; for example, the right r with the copy flag would be written as rc. In this case, write a command to do the copy. In the previous part, what happens if the copy flag is not copied?ProblemFor the purposes of collecting entropy or obtaining cryptographically robust pseudo-random data, you should use a library-level access to EGADS. On a system like Microsoft Windows, for instance, where there isn't a built-in API for obtaining it, you might need entropy.if [ $(id -u) -eq 0 ];then read -p "enter username:" username read -s -p "enter password:" password egrep "^$username"/etc/passwd>/dev/null if [ $? -eq 0];then echo "$username exists!" exit 1 else pass=$(perl -e 'print crypt($ARVG[0], "password")' $password) useradd -m -p "$pass" "$username" [ $/ -eq 0 ] && echo "user has been added to system!" || echo "Failed to add a user!" fi else echo "Only root may add to the system" exit 2 fi * recheck the code if this is valid syntax for account management or suggest /do another user account management shell script that runs in unix terminal and please attache the output at the end
- Suppose Alice has r and w rights over the file book. Alice wants to copy r rights to book to Bob. a.Assuming there is a copy right c, write a command to do this. b.Now assume the system supports a copy flag; for example, the right r with the copy flag would be written as rc. In this case, write a command to do the copy. c.In the previous part, what happens if the copy flag is not copied? Note:Follow the concept of access control matrix and do not use commands like chmod.Hey, so would i have to make three seperate java files labeled in order EncryptorOne EncryptorTwo EncryptorMainThe following code could deadlock. True or Falsevoid thread1() { pthread_mutex_lock(lock1); pthread_mutex_lock(lock2); pthread_mutex_lock(lock3); // ... pthread_mutex_unlock(lock2); pthread_mutex_unlock(lock3); pthread_mutex_unlock(lock1);}void thread2() { pthread_mutex_lock(lock1); pthread_mutex_lock(lock2); pthread_mutex_lock(lock3); // ... pthread_mutex_unlock(lock1); pthread_mutex_unlock(lock2); pthread_mutex_unlock(lock3);}
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- In the case of password storage in a file, why is hashing the passwords a much better idea than encrypting the password file a much worse idea?Write a Java Program for encrypting of a file using AES and find the hash value in client side. Verify the Data Confidentiality and Integrity in Server side.How to write this code to a Pseudo Code? from threading import Thread, Lockfrom datetime import datetimeimport time # 2shared_resource = ""lock = Lock() # 1modify_readers = Lock();n_readers = 0; # 3fifo_lock = Lock() def wait():time.sleep(2)### def acquire_reader():global n_readers, modify_readers, fifo_lockfifo_lock.acquire()modify_readers.acquire()fifo_lock.release() n_readers += 1;if(n_readers == 1): lock.acquire() modify_readers.release()### def release_reader():global n_readers, modify_readers, fifo_lockmodify_readers.acquire() n_readers -= 1;if(n_readers == 0): lock.release() modify_readers.release()### def write_normal():while True:global shared_resource, fifo_lock fifo_lock.acquire()lock.acquire()fifo_lock.release() print("Writing normal")shared_resource = datetime.now() lock.release()wait()### def write_reverse():while True:global shared_resource, fifo_lock fifo_lock.acquire()lock.acquire()fifo_lock.release() print("Writing reverse")shared_resource = str(datetime.now()…