Question: Do the following in Linux 1 . Check the permission of files A 1 . sh and A 2 . sh & change the us

Do the following in Linux
1. Check the permission of files A1.sh and A2.sh & change the us permission to execute mode.
2. Create 5 file A3, A4, A5, A6, A7 in the directory ABC at once command.
3. Create a group mygroup1 and add user by myuser1, myuser2, myuser3 in it.
4. Change the password policy for myuser1 to require a new password every 90 days.
5 Show the permission of above group mygroup1.
6. What is the use of date command?

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