Red Hat Red Hat Certifications EX294 Questions & Answers

• Question 11:

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

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  1.

  Login as a root user

  2.

  cat >schedule.txt 30 05 * * * /bin/echo "Hello"

  3.

  crontab -u jeff schedule.txt

  4.

  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

• Question 12:

  Make Secondary belongs the jeff and marion users on sysusers group. But harold user should not belongs to sysusers group.

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  1.

  usermod -G sysusers jeff

  2.

  usermod -G sysuser marion

  3.

  Verify by reading /etc/group file

  Note:

  Using usermod command we can make user belongs to different group. There are two types of group one primary and another is secondary. Primary group can be only one but user can belong to more than one group as secondary. usermod

  -g groupname username - To change the primary group of the user. usermod -G groupname username - To make user belongs to secondary group.

• Question 13:

  Create the directory /storage and group owner should be the sysusers group.

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  chgrp sysusers /storage

  Verify using ls -ld /storage command.

  You should get like drwxr-x--- 2 root sysusers 4096 Mar 16 17:59 /storage chgrp command is used to change the group ownership of particular files or directory.

  Another way you can use the chown command.

  chown root:sysusers /storage

• Question 14:

  Create the group named sysusers.

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  1. groupadd sysusers groupadd command is used to create the group and all group information is stored in /etc/group file.

• Question 15:

  You are working as an Administrator. There is a common data shared (/data) from 192.168.0.254 to all users in your local LAN. When user's system start, shared data should automatically mount on /common directory.

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  To automatically mount at boot time, we use the /etc/fstab file. Because /etc/rc.d/rc.sysinit file reads and mounts all file system specified in /etc/fstab. To mount Network Sharing Files also use the /etc/fstab but filesystem is nfs.

  

• Question 16:

  Make on /storage directory that only the user owner and group owner member can fully access.

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  1.

  chmod 770 /storage

  2.

  Verify using : ls -ld /storage

  Note:

  Preview should be like: drwxrwx--- 2 root sysusers 4096 Mar 16 18:08 /storage To change the permission on directory we use the chmod command. According to the question that only the owner user (root) and group member (sysusers) can

  fully access the directory so:

  chmod 770 /archive

• Question 17:

  Create the users named jeff, marion, harold

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  1.

  useradd jeff

  2.

  useradd marion

  3.

  useradd harold

  Note:

  useradd command is used to create the user.

  All user's information stores in /etc/passwd and user's shadow password stores in /etc/shadow.

• Question 18:

  You access the iscsi shared storage. The storage server ip is 172.24.30.100. Separate of 1500M space, format as ext3 file system, mount under /mnt/data, and make sure the root-start automatically mount.

  A. Answer: See the for complete Solution below.

  Correct Answer: A

• Question 19:

  

  There are two different networks 192.168.0.0/24 and 192.168.1.0/24. Where 192.168.0.254 and 192.168.1.254 IP Address are assigned on Server. Verify your network settings by pinging 192.168.1.0/24 Network's Host.

  A. Answer: See the for complete Solution below.

  Correct Answer: A

  

• Question 20:

  One Logical Volume is created named as myvol under vo volume group and is mounted. The Initial Size of that Logical Volume is 400MB. Make successfully that the size of Logical Volume 200MB without losing any data. The size of logical volume 200MB to 210MB will be acceptable.

  A. Answer: See the for complete Solution below.

  Correct Answer: A