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SUSE CERTIFIED ENGINEER (SCE) IN ENTERPRISE LINUX ,CHAP 2 - INSTALLING OPENSUSE
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SUSE CERTIFIED ENGINEER (SCE) IN ENTERPRISE LINUX ,CHAP 2 - INSTALLING OPENSUSE
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SUSE CERTIFIED ENGINEER (SCE) IN ENTERPRISELINUX ,CHAP 2 - INSTALLING OPENSUSE
List Snapshots - Answers -# snapper list
Locate Snapshots in the system - Answers -# mount | grep snapshot
Create a timeline snapshot called "my snapshot" - Answers -# snapper create --
cleanup-algorithm timeline --description "my snapshot"
Show differences between snapshot 21 and snapshot 22 - Answers -# snapper diff
21..22
# snapper status 21..22
View meta-information about snapshot 22 - Answers -# cat /.snapshots/22/info.xml
# cat /.snapshosts/22/filelist-21.txt
List available snapper configurations - Answers -# snapper list-configs
Create a snapper configuration named "data1" for the /data1 subvolume - Answers -#
snapper --config data1 create-config /data1
(it's necessary to have created the subvolume first with "btrfs subvolume create /data1")
Create a snapshot based on the "data1" configuration, using the cleanup algorithm
"timeline" and with the description "mydata1snapshot" - Answers -# snapper --config
data1 create --cleanup-algorithm timeline --description mydata1snapshot
Switch to the "multi-user" target - Answers -# systemctl isolate multi-user.target
Start "SSH agent" to track authentication - Answers -# ssh-agent bash
Add private key to SSH Agent for authentication - Answers -# ssh-add ~/.ssh/id_rsa
Show the local NFS exports - Answers -# showmount -e localhost
Create an htpasswd file (named "/etc/apache2/htpasswd") with an Apache user called
"geeko" and password "suse" - Answers -# htpasswd2 -c /etc/apache2/htpasswd geeko
(enter "suse" at the prompt)
Test Samba configuration - Answers -# testparm
Set Samba password for the user "geeko" - Answers -# smbpasswd -a geeko
, Get info about Samba "shares" from "server1" for the "tux" user - Answers -# smbclient
--list server1 -U tux
Using Samba, access the home directory from "server1" for the "tux" user - Answers -#
smbclient -U tux //server1/tux
Mount the "data" Samba share (from "server1") in the "/mnt" local directory, using the
username "tux" - Answers -# mount -t cifs -o username=tux //server1/data /mnt
List the snapshots that use the "data1" configuration - Answers -# snapper --config
data1 list
Delete the snapshot numbered 22 - Answers -# snapper delete 22
What does a systemd Unit File (Unit Configuration File) do? - Answers -A unit
configuration file encodes information about a service, a socket, a device, etc.
What is the difference between "disabling" a service -versus- "masking" a service? -
Answers -After "disabling" a service, an unmasked service can still be started manually;
after "masking" it, it cannot
List the configured systemd targets - Answers -# systemctl list-units type=target
What line should you add to "fstab" in "server2" to mount, in "/import/samba", the
Samba "data" share from "server1"? - Answers -//server1/data /import/samba cifs
defaults,credentialsfile=/etc/samba/data-credentials 0 0
Prevent all normal users from logging in - Answers -1 - Edit the file /etc/pam.d/login and
UNCOMMENT (remove "#" from the beginning) the following line:
auth requisite pam_nologin.so
(NOTE: This applies to local login sessions, but NOT to SSH sessions)
2 - Create the file /etc/nologin with the content "No login"
Change the default ACL for the "/tmp/acl_test" subdirectory to allow the "geeko" user to
read and write - Answers -# setfacl -d -m u:geeko:rwx /tmp/acl_test
Remove all the ACL entries from the "/tmp/acl_test" subdirectory - Answers -# setfacl -b
"/tmp/acl_test"
Install the appropriate YaST Module in an iSCSI Server - Answers -# zypper in yast2-
iscsi-lio-server
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