Just passed the RHCE exam of RHEL6 in Singapore, took the exam of EX200 (RHCSA) on 9th Oct.
1, linux rw in maintenance mode After enter into the maintenance mode, sometimes you need to modify the system files, but you don’t have the rw access right to the system file, can use this command to reload the file system as the rw mode.
Create quota for user alice and /home/alice, least/soft limit is 40K, when exceeding 80K, the system will display the exceeded the user quota.
1, Configure SMTP mail service according to the following requiremnets:— Your mail server should accept mail from remote hosts and localhost— harry must be able to receive mail from remote hosts — Mail delivered to mary should spool into the default mail spool for mary /var/spool/mail/mary install the postfix, yum install -y postfix start the postfix and make it auto on when booting, service postfix start chkconfig postfix on modify the main.cf vim /etc/postfix/main.cf the original inet_interfaces is localhost, if needs to receive the internal and external mails, needs to switch on inet_interfaces = all, and comments off localhost, as following, inet_interfaces = all #inet_interfaces = $myhostname #inet_interfaces = $myhostname, localhost #inet_interfaces = localhost harry is local user, so he can receive the external mail, mary should spool into the default mail spool for mary /var/spool/mail/mary, this one also no need to do anything.
1, Implement a web server for the site http://serverX.example.com,then perform the following steps:— Download ftp://instructor.example.com/pub/rhce/server.html— Rename the downloaded file to index.html— Copy this index.html to DocumountRoot of your web server — Do NOT make any modifications to the content of index.html Install the http, yum install http* start the service and make it auto start when booting, service httpd start chkconfig httpd on download the server.html to the DocumentRoot cd /var/www/html/ lftp 192.168.0.254 cd pub/rhce get server.html rename it to index.html mv server.html index.html copy to the DocumentRoot, cp index.html /var/www/html Restore the default SELinux security context, restorecon –RvF * restart the httpd service, service httpd restart Test it in the Firefox, input the server3.example.com, you will get the content of the index.html or test from the instructor computer, elinks server4.example.com 2, Extend your web server to include a virtual host for the site http://wwwX.example.com/,where X is your server number,then perform the
1, control the FTP access the system, Clients within the example.com domain should have anonymous FTP access to your machine, Clients outside example.com should NOT have access to your FTP Service modify the /etc/hosts.allow vsftpd: .example.com modify the /etc/hosts.deny vsftpd: ALL start the vsftpd and make it auto on /etc/init.d/vsftpd start chckconfig vsftpd on 2, connect to ISCSI target from instructor.example.com, you should mount this filesystem to /mnt/iscsi directory and automatically useable at system boot time check the iscsi (iscsi-initiator-utils) installed or not, if not installed, needs to install, rpm –qa |grep iscsi-initiator-utils yum –y install iscsi-initiator-utils discover the iscsi, and after the command, it will display the iqn text for the usage in the next command, iscsiadm -m discovery -t st -p 192.168.0.254 login to iscsi server, iscsiadm -m node -T iqn.2010-09.com.example:rdisks.server3 -p 192.168.0.254 -l check the iscsi attached or not, dmesg |tail fdisk -l format the attached iscsi, by fdisk /dev/sdb, then n,p,1,
1, install the http server, make it automatically startup yum install -y http* /etc/init.d/httpdd start chkconfig httpd on 2, create logical volume, name as lv0, lv0 belong to logical group vg0, PE size as 8M, logical volume as 40 PE, formatted as ext4, mount to /data, and make it automatically mounted when start, fdisk /dev/sda to create physical partition, label as 0x8e, make it usable by partx command, partx -a /dev/sda create pv, pvcreate /dev/sda4 create vg, the PE size as 8M vgcreate –s 8M vg0 /dev/sda4 create lv, name as lv0, size as 40 PE.
1, ldap for user authentication, without autofs Bind to the ldap domain provided by 192.168.0.254 for user authentication.
1, create group, add user belong to the group, and create password, create the group ‘admin’ groupadd admin add user to the group, useradd -G admin mary useradd -G admin alice useradd -s /sbin/nologin bobby user bobby added, but does not belong to group admin, and dose not have access to an interactive shell on the system.