RedHat EX300 RHCE Exam Practice Test Instant Access

Question 1

There were two systems:

system1, main system on which most of the configuration take place

system2, some configuration here

Configure selinux.

Configure your systems that should be running in Enforcing.

AOption

After reboot and verify with this command

BOption

Answer : A

Question 2

Add a cron schedule to take full backup of /home on every day at 5:30 pm to /dev/st0 device.

A1. vi /var/schedule
30 17 * * * /sbin/dump -0u /dev/st0 /dev/hda7
2. crontab /var/schedule
3. servicecrond restart
We can add the cron schedule either by specifying the scripts path on /etc/crontab file or by creating on text file on crontab pattern.
cron helps to schedule on recurring events. Pattern of cron is: Minute Hour Day of Month Month
Day of Week Commands
0-59 0-23 1-31 1-12 0-7 where 0 and 7 mean Sunday.
Note * means every. To execute the command on every two minutes */2.

B1. vi /var/schedule
30 17 * * * /sbin/dump -0u /dev/st0 /dev/hda7
2. crontab /var/schedule
3. servicecrond restart
We can add the cron schedule either by specifying the scripts path on /etc/crontab file or by creating on text file on crontab pattern.
Day of Week Commands
0-59 0-23 1-31 1-12 0-7 where 0 and 7 mean Sunday.
Note * means every. To execute the command on every two minutes */2.

Answer : A

Question 3

There are Mail servers, Web Servers, DNS Servers and Log Server. Log Server is already configured.

You should configure the mail server, web server and dns server to send the logs to log server.

AAccording to question, log server is already configured. We have to configure the mail, web and dns server for log redirection. In mail, web and dns server:
vi /etc/syslog.conf mail.* @logserveraddress
service syslog restart
mail is the facility and * means the priority. It sends logs of mail services into log server.

BAccording to question, log server is already configured. We have to configure the mail, web and dns server for log redirection. In mail, web and dns server:
vi /etc/syslog.conf mail.* @logserveraddress
mail is the facility and * means the priority. It sends logs of mail services into log server.

Answer : A

Question 4

One Package named zsh is dump on ftp://server1.example.com under pub directory. Install the package from ftp server.

Arpm -ivh ftp://server1.example.com/pub/zsh-*
Package will install
rpm command is used to install, update and remove the package, -i means install, -v means verbose and -h means display the hash mark.
B . rpm -ivh ftp://server1.example.com/pub/zsh-*
Package will install
rpm command is used to install, update and remove the package.

Answer : A

Question 5

Whoever creates the file on /data make automatically owner group should be the group owner of /data directory.

AWhen user creates the file/directory, user owner will be user itself and group owner will be the primary group of the user.
There is one Special Permission SGID, when you set the SGID bit on directory. When users create the file/directory automatically owner group will be same as a parent.
1. chmodg+s /data
2. Verify using: ls -ld /data
You will get: drwxrws---

BWhen user creates the file/directory, user owner will be user itself and group owner will be the primary group of the user.
There is one Special Permission SGID, when you set the SGID bit on directory.
1. chmodg+s /data
2. Verify using: ls -ld /data
You will get: drwxrws---

Answer : A

Question 6

Give Full Permission to owner user and owner group member but no permission to others on /data.

AWe can change the permission of file/directory either character symbol method or numeric method.
Permission:
r-Read
w-Write
x-Execute Permission Category u- Owner User
g- Owner Group
o- Others
Operators
+ -> Add the Permissions
- ->Remove the Permissions = ->Assign the Permissions Numeric Method:
4 -> Read
2 -> Write
1 -> Execute
Total: 7, total for owner user, owner group member and for others: 777
1. chmodu+rwx /data
2 .chmodg+rwx /data
3. chmod o-rwx /data
or
chmod 770 /data
4 Verify the /data: ls -ld /data
5. You will get drwxrwx---

BWe can change the permission of file/directory either character symbol method or numeric method.
Permission:
r-Read
w-Write
- ->Remove the Permissions = ->Assign the Permissions Numeric Method:
4 -> Read
2 -> Write
1 -> Execute
Total: 7, total for owner user, owner group member and for others: 777
1. chmodu+rwx /data
2 .chmodg+rwx /data
3. chmod o-rwx /data
or
chmod 770 /data
4 Verify the /data: ls -ld /data
5. You will get drwxrwx---

Answer : A

Question 7

Install the Cron Schedule for jeff user to display "Hello" on daily 5:30.

ALogin as a root user
cat >schedule.txt
30 05 * * * /bin/echo 'Hello'
crontab -u jeff schedule.txt
service crond restart
The cron system is essentially a smart alarm clock. When the alarm sounds, Linux runs the commands of your choice automatically. You can set the alarm clock to run at all sorts of regular time intervals. Alternatively, the system allows you to run the command of your choice once, at a specified time in the future.
Red Hat configured the cron daemon, crond. By default, it checks a series of directories for jobs to run, every minute of every hour of every day. The crond checks the /var/spool/cron directory for jobs by user. It also checks for scheduled jobs for the computer under /etc/crontab and in the /etc/cron.d directory.
Here is the format of a line in crontab. Each of these columns is explained in more detail:
#minute, hour, day of month, month, day of week, command
* * * * * command
Entries in a crontab Command Line
Field Value
Minute 0-59
Hour Based on a 24-hour clock; for example, 23 = 11 p.m.
Day of month 1-31
Month 1-12, or jan, feb, mar, etc.
Day of week 0-7; where 0 and 7 are both Sunday; or sun, mon, tue, etc.
Command: The command you want to run

BLogin as a root user
cat >schedule.txt
30 05 * * * /bin/echo 'Hello'
crontab -u jeff schedule.txt
service crond restart
The cron system is essentially a smart alarm clock. When the alarm sounds, Linux runs the commands of your choice automatically. You can set the alarm clock to run at all sorts of regular time intervals. Alternatively, the system allows you to run the command of your choice once, at a specified time in the future.
Here is the format of a line in crontab. Each of these columns is explained in more detail:
#minute, hour, day of month, month, day of week, command
* * * * * command
Entries in a crontab Command Line
Field Value
Minute 0-59
Hour Based on a 24-hour clock; for example, 23 = 11 p.m.
Day of month 1-31
Month 1-12, or jan, feb, mar, etc.
Day of week 0-7; where 0 and 7 are both Sunday; or sun, mon, tue, etc.
Command: The command you want to run

Answer : A

RedHat EX300 Red Hat Certified Engineer Exam RHCE Exam Practice Test