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Correct Answer: Check the anser in explanation.

crontab –e –u natasha 23 14/bin/echo hiya crontab -l -u natasha // view systemctlenable crond systemcdlrestart crond

Correct Answer: Check the anser in explanation.

# useradd -G admin harry # useradd -G admin natasha # useradd -s /sbin/nologin tom # id harry;id Natasha (Show additional group) # cat /etc/passwd (Show the login shell) OR # system-config-users

Correct Answer: Check the anser in explanation.

lvextend -L+200M /dev/test0/testvolume1 Use lvdisplay /dev/test0/testvolume1)

ext2online -d /dev/test0/testvolume1

lvextend command is used the increase the size of Logical Volume. Other command lvresize command also here to resize. And to bring increased size on online we use the ext2online command.

Correct Answer: Check the anser in explanation.

* [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vdd 252:48 0 5G 0 disk vde 252:64 0 10G 0 disk vdo1 253:4 0 50G 0 vdo /vbread [root@node2 ~]# yum install stratis* -y [root@node2 ~]# systemctl enable --now stratisd.service [root@node2 ~]# systemctl start stratisd.service [root@node2 ~]# systemctl status stratisd.service [root@node2 ~]# stratis pool create think_pool /dev/vdd [root@node2 ~]# stratis pool list Name Total Physical Properties think_pool 5 GiB / 37.63 MiB / 4.96 GiB ~Ca,~Cr

* [root@node2 ~]# stratis filesystem create think_pool think_fs [root@node2 ~]# stratis filesystem list Pool Name Name Used Created Device UUID think_pool think_fs 546 MiB Mar 23 2021 08:21 /stratis/think_pool/think_fs ade6fdaab06449109540c2f3fdb9417d [root@node2 ~]# mkdir /strav [root@node2 ~]# lsblk [root@node2 ~]# blkid /dev/mapper/stratis-1-91ab9faf36a540f49923321ba1c5e40d-thin-fs- ade6fdaab06449109540c2f3fdb9417d: UUID="ade6fdaa-b064-4910-9540-c2f3fdb9417d" BLOCK_SIZE="512" TYPE="xfs"

* [root@node2 ~]# vim /etc/fstab UUID=ade6fdaa-b064-4910-9540-c2f3fdb9417d /strav xfs defaults,x- systemd.requires=stratisd.service 0 0 [root@node2 ~]# mount /stratis/think_pool/think_fs /strav/ [root@node2 ~]# df -hT /dev/mapper/stratis-1-91ab9faf36a540f49923321ba1c5e40d-thin-fs- ade6fdaab06449109540c2f3fdb9417d xfs 1.0T 7.2G 1017G 1% /strav

Correct Answer: Check the anser in explanation.

* [root@node1 ~]# cat /etc/passwd | grep nologin > /root/strings [root@node1 ~]# cat /root/strings bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin mail:x:8:12:mail:/var/spool/mail:/sbin/nologin