AFTERMATH

Question 1

SETUP REPOFILE

Answer 1

[BaseOS]

name=BaseOS
baseurl=what they give
enabled=1

Question 2

Configure nodes IPs first.

then, go to sshd_config file in BOTH nodes and un-hash PermitRootLogin and PublickeyAuthentication and PasswordAuthentication

Question 3

for SELINUX question, consult semanage-fcontex and -port pages

Do systemctl status httpd to see what is going wrong

restart service

Question 4

create user and remove shell access

give group or user access to add user in the server

harry ALL=(ALL) explain?

harry ALL=(ALL) NOPASSWD: ALL

Answer 4

-useradd -s /sbin/nologin user

use which useradd, go to visudo and add: %group ALL=(ALL) /usr/bin/passwd

can on all host run any command as any user

can do anything, on anyhost, with no passwd

Question 5

do cronjob that runs every 1 minute and does a command as a david

export a directory (/netdir/netuser)

Answer 5

crontab -e -u david
*/1 * * * * whatever they provide

-download nfs-utils/autofs

-go to auto.master, add /netdir /etc/auto.misc

/etc/auto.misc= add username, rw, sync, and hostname: /path/to/user/on/server

-restart autofs, enable autofs, try to switch to user

Question 6

create an access control list that gives rw to someone, no access to someone else

after changing ntp and restarting chronyd, type /etc/chrony.conf to verify change

Answer 6

setfacl -m u:user1:rw- /path/to/file
setfacl -m u:user2:— /path/to/file

Question 7

find all files AND directories from user2, copy to /root/beer

MAY ASK THIS AS SCRIPT. (make .sh, chmod 755, run it)

start your scripts with #!/bin/bash

Answer 7

find / -user user2 -exec cp -rf {} /root/beer/ \;

Question 8

make lvm x from volume group y. PE size= 8MB, LVM=50 extents, format=xfs, mount= /mnt/x. Persistent

user swapon -a after creating swaps

Answer 8

vgcreate -s 8M y /dev/sdc1
lvcreate -l 50 -n x /dev/y
mkfs.xfs /dev/y/x

make directory

get UUID, go to fstab, systemctl daemon-reload, mount -a, reboot

Question 9

resize vo logical volume (300M) to 400M

INSTALL TUNED YOU DIRTY FUCKER

Answer 9

lvextend -r -l +100M /dev/vg/lv

OR

lvresize -r -l 400M /dev/vg/lv

Question 10

configure and build rhcsa app for user 3 that prints “fuck off”

Answer 10

!/bin/bash

vim /usr/local/bin/rhcsa

echo “fuck off”

chmod 755 it. IMPORTANT!

THEN, vim /home/user3/.bash_profile and add the file BELOW fi

ssh as user3ssh

Question 11

mkcreate container, name it monitor, create it as athena,

Answer 11

1.ssh athena@localhost

2. wget <link></link>
3. login into registry
4. podman build -t monitor -f .

Question 12

add a umask for a user

copy string ‘this’ from file.txt to this.txt. No empty lines allowed

Answer 12

open their .bashrc and add it there

grep ‘this’ /root/file.txt | grep -v ‘^$’ > /root/this.txt

Question 13

deny a user a cronjob

passwords should expire after X days for all users

Answer 13

vim /etc/cron.deny, put in user name, try to see if workss

go to vim /etc/login.defs, create a user and verify this happens with chage -l username

Question 14

grep something with no empty lines