RHSCA(complete study guide with correct solutions.)

Add 3 users: harry, natasha, tom. The requirements: The Additional group of the two users: harry, Natasha is the admin group. The user: tom's login shell should be non-interactive. Answer: # useradd -G admin harry # useradd -G admin natasha # useradd -s /sbin/nologin tom # id harry;id Natasha (Show additional group) # cat /etc/passwd RedHat EX200 Exam "Certification Depends on Only One Thing" - 2 (Show the login shell) OR # system-config-users Configure a task: plan to run echo hello command at 14:23 every day. Answer: # which echo # crontab -e 23 14 * /bin/echo hello # crontab -l (Verify) Find the files owned by harry, and copy it to catalog: /opt/dir Answer: # cd /opt/ # mkdir dir # find / -user harry -exec cp -rfp {} /opt/dir/ ; QUESTION NO: 6 CORRECT TEXT Find the rows that contain abcde from file /etc/testfile, and write it to the file/tmp/testfile, and the sequence is requested as the same as /etc/testfile. Answer: # cat /etc/testfile | while read line; do echo $line | grep abcde | tee -a /tmp/testfile done OR grep `abcde' /etc/testfile /tmp/testfile Create a 2G swap partition which take effect automatically at boot-start, and it should not affect the original swap partition Answer: # fdisk /dev/sda p (check Partition table) n (create new partition: press e to create extended partition, press p to create the main partition, and theextended partition is further divided into logical partitions) Enter +2G t l W partx -a /dev/sda partprobe mkswap /dev/sda8 Copy UUID swapon -a vim /etc/fstab UUID=XXXXX swap swap defaults 0 0 (swapon -s) Install a FTP server, and request to anonymous download from /var/ftp/pub catalog. (it needs you to configure yum direct to the already existing file server. ) Answer: # cd /etc/.d # vim [local] name= baseurl=file:///mnt enabled=1 gpgcheck=0 # yum makecache # yum install -y vsftpd # service vsftpd restart # chkconfig vsftpd on # chkconfig --list vsftpd # vim /etc/vsftpd/ anonymous_enable=YES Configure a HTTP server, which can be accessed through . Please download the released page from http://ip/dir/. Answer: # yum install -y httpd # chkconfig httpd on # cd /var/www/html # wget http://ip/dir/ # cp # vim /etc/httpd/conf/ NameVirtualHost 192.168.0.254:80 VirtualHost 192.168.0.254:80 DocumentRoot /var/www/html/ ServerName /VirtualHost Configure the verification mode of your host account and the password as LDAP. And it can ldapuser40. The password is set as "password". And the certificate login successfully through can be downloaded from http://ip/dir/. After the user logs on , the user has no host directory unless you configure the autofs in the following questions. Answer: system-config-authentication LDAP Server: ldap// (In domain form, not write IP) OR # yum groupinstall directory-client (5-workstation -krb5 ) # system-config-authentication 1.User Account Database: LDAP 2.LDAP Search Base DN: dc=example,dc=com 3.LDAP Server: ldap:// (In domain form, not write IP) 4.Download CA Certificate 5.Authentication Method: LDAP password 6.Apply getent passwd ldapuser40 QUESTION NO: 12 CORRECT TEXT Configure autofs to make sure after login successfully, it has the home directory autofs, which is shared as /rhome/ldapuser40 at the ip: 172.24.40.10. and it also requires that, other ldap users can use the home directory normally. Answer: # chkconfig autofs on # cd /etc/ # vim /etc/r /rhome /etc/ # cp # vim ldapuser40 -rw,soft,intr 172.24.40.10:/rhome/ldapuser40 * -rw,soft,intr 172.16.40.10:/rhome/& # service autofs stop # server autofs start # showmount -e 172.24.40.10 # su - ladpuser40 Configure the system synchronous as 172.24.40.10. Answer: Graphical Interfaces: System--Administration--Date & Time OR # system-config-date QUESTION NO: 14 CORRECT TEXT Change the logical volume capacity named vo from 190M to 300M. and the size of the floating range should set between 280 and 320. (This logical volume has been mounted in advance.) Answer: # vgdisplay (Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend) # lvdisplay (Check lv) # lvextend -L +110M /dev/vg2/lv2 # resize2fs /dev/vg2/lv2 mount -a (Verify) ------------------------------------------------------------------------------- (Decrease lvm) # umount /media # fsck -f /dev/vg2/lv2 # resize2fs -f /dev/vg2/lv2 100M # lvreduce -L 100M /dev/vg2/lv2 # mount -a # lvdisplay (Verify) OR # e2fsck -f /dev/vg1/lvm02 # resize2fs -f /dev/vg1/lvm02 # mount /dev/vg1/lvm01 /mnt # lvreduce -L 1G -n /dev/vg1/lvm02 # lvdisplay (Verify) QUESTION NO: 15 CORRECT TEXT Create a volume group, and set 16M as a extends. And divided a volume group containing 50 RedHat EX200 Exam "Certification Depends on Only One Thing" - 7 extends on volume group lv, make it as ext4 file system, and mounted automatically under /mnt/data. Answer: # pvcreate /dev/sda7 /dev/sda8 # vgcreate -s 16M vg1 /dev/sda7 /dev/sda8 # lvcreate -l 50 -n lvm02 # 4 /dev/vg1/lvm02 # blkid /dev/vg1/lv1 # vim /etc/fstab # mkdir -p /mnt/data UUID=xxxxxxxx /mnt/data ext4 defaults 0 0 # vim /etc/fstab # mount -a # mount (Verify) Upgrading the kernel as 2.6.36.7.1, and configure the system to Start the default kernel, keep the old kernel available. Answer: # cat /etc/ # cd /boot # lftp it # get dr/dom/ # rpm -ivh # vim /etc/ default=0 Create a 512M partition, make it as ext4 file system, mounted automatically under /mnt/data and which take effect automatically at boot-start. Answer: # fdisk /dev/vda n +512M w # partprobe /dev/vda RedHat EX200 Exam "Certification Depends on Only One Thing" - 8 # mkfs -t ext4 /dev/vda5 # mkdir -p /data # vim /etc/fstab /dev/vda5 /data ext4 defaults 0 0 # mount -a Create a volume group,and set 8M as a extends. Divided a volume group containing 50 extends on volume group lv (lvshare), make it as ext4 file system, and mounted automatically under /mnt/data. And the size of the floating range should set between 380M and 400M. Answer: # fdisk # partprobe # pvcreate /dev/vda6 # vgcreate -s 8M vg1 /dev/vda6 -s # lvcreate -n lvshare -l 50 vg1 -l # 4 /dev/vg1/lvshare # mkdir -p /mnt/data # vim /etc/fstab /dev/vg1/lvshare /mnt/data ext4 defaults 0 0 # mount -a # df -h Download ftp://192.168.0.254/pub/ to /root, and mounted automatically under /media/cdrom and which take effect automatically at boot-start. Answer: # cd /root; wget ftp://192.168.0.254/pub/ # mkdir -p /media/cdrom # vim /etc/fstab /root/ /media/cdrom iso9660 defaults,loop 0 0 # mount -a mount [-t vfstype] [-o options] device dir QUESTION NO: 20 CORRECT TEXT Add admin group and set gid=600 Answer: # groupadd -g 600 admin