RHCSA Tasks

Question 1

Reset Forgotten Root Password:

Answer 1

1) Reset Linux server
2) Press e to edit the GRUB menu
3) Go to the end of the line starting with linux16 and enter rd.break
4) Press crtl-x
5) at prompt # mount -o remount,rw /sysroot
6) chroot /sysroot
7) passwd
8) touch /.autorelabel

Question 2

Extending logical volume

Answer 2

Cannot extend dynamically

umount /mount

lvextend -L 1G /dev/vg00/lv1

for ext:
resizefs /dev/vg00/lv1

for xfs:
xfsgrowfs /dev/vg00/lv1

Question 3

To grow the logical volume while still mounted

Answer 3

To increase the size to 900MB

lvresize -L 900M /dev/vg00/lv1

Question 4

Label a filesystem

Answer 4

xfs_admin -L “filesystem1” /dev/sda1

tune2fs -L “filesystem2” /dev/sda2

Question 5

Set fsck to 2 and dump to 1 in fstab

Answer 5

LABEL=filesystem2 /mnt/mount2 ext4 defaults 1 2

Question 6

Set the default permissions on dir1 to read, write and execute for the starbuck user; execute only if it is a directory.

Answer 6

setfacl -d -m u:starbuck:rwX dir1