RHCSA 整理

THE RHCSA EXAMINATION1 Configure the hostname, ip address, netmask, gateway and DNS with the following components:HOSTNAME: IP: 192.168.0.100+XNETMASK: 255.255.255.0GATEWAY: 192.168.0.254DNS: 192.168.0.254IP: Vim /etc/sysconfig/network-scripts/ifcfg.eth0DNS: Vim /etc/resolvesHOSTNAME: Vim /etc/sysconfig/network2 Create three user accounts with the following attributes:User name: harry, natasha,tomharry and natasha will have the appended group named admin, the login shell of tom will be the noninteractive shell.Useradd –G admin harryUseradd –G admin NatashaUseradd –s /sbin/nologin tom3 Create a directory named admins in the location /home, and the group-owner is admin, the members in the group will have access to read and write. The others will have not any privileges. The users in the same group (admin) can create files in the directory and also with the group-owner admin.Mkdir /home/adminsChgrp admin /home/adminsChmod 770 /home/adminsChmod g+s /home/admins4 Configure the plan and task: 14:23 , everyday, execute the command:/bin/echo "Good morning!"Crontab –eCrontab –l 查询验证5 Search all the documents which the owner attributes is harry , then copy them to /opt/dir.Find / -user harry –exec cp –rp {} /opt/dir \;6 Find all the lines including "gedit" frome /etc/testfile, and write them into /tmp/testfile with the same order of its being in the /etc/testfile.Cat /etc/testfile | grep gedit > /tmp/testfile7 Create a swap space with 2G capacity, and autoactivate when start the computer. but won't effect the primary swap space.Fdisk /dev/vdaN --- p--- +2G----t ---X---82Partx –a /dev/vdaMkswap /dev/vdaXVim /etc/fstab/dev/vdaX swp swp default 0,0Swapon –afree8 Create an user alex with the UID 1234, and the password is alex111Useradd –u 1234 alex9 Install a FTP server, and anonymous downloading is allowed from /var/ftp/pubVim /etc/yum.repos.d/x.repo 文件Yum –y install vsftpd/etc/init.d/vsftpd startChkconfig vsftpd on10 Configure a http server, and it can be accessed through , the released page can be downloaded from /pub/ex200/example.htmlYum –y install httpdCd /var/www/htmlLftp 192.168.0.254Cd /pub/ex200Get example.htmlExitMv example.html index.html/etc/init.d/httpd restartChkconfg httpd on再浏览器中输入验证/pub/ex200/example.html11 Configure the host account, and with LDAP for the password authentication. successfully login in ldapuserX,and the password of ldapuserX is: redhat. LDAP SERVER : ldap://TLS/SSL CERT : /pub/cacert-ca.crtRpm –qa | grep openldapSystem-config-authentication 图形化Getent passwd ldapuser20Su – ldapuser2012 Configure autofs, when ldapuserX login successfully, it will have its homedirectory /rhome/ldapuserX. the home directory is shared to /rhome/ldapuserX by nfs in 192.168.0.254.Vim /etc/auto.master/rhome /etc/auto.homeCp /etc/auto.misc /etc/auto.homeVim /etc/auto.homeLdapuser20 -fstye=nfs 192.168.0.254Showmount –e 192.168.0.254/etc/init.d/autonfs reloadSu – ldapuser2013 Configure your system time, which is synchronous with 192.168.0.254System-config-date14 There is a logic volume named vo, change its capacity from 190M to 300M,and the capacity scope is 280~320M ( the lv has been mounted in advance).Df –hVgsLvextend –L 300M /dev/vgsrv/voResize2fs /dev/vgsrv/vo15 Create a volume group named vgrhce, the physical extent is 16M, create a lv named lvrhce with the capacity of 50 PEs. Format the device as an ext4 filesystem, and mount automatically to /mnt/data when start the system.fdisk /dev/vdapartx –a /dev/vdapvcreate /dev/vdaXvgcreate vgrhce –s 16M /dev/vdaXlvcreate –l 50 –n lvrhce vgrhcemkfs.ext4 /dev/vgrhce/lvrhcevim /etc/fstab/dev/vgrhce/lvrhce /mnt/data default 0,016 Upgrade the kernel 2.6.32-131 , set the kernel to be the default kernel, and keep the old kernel available.The new kernel rpm file can be downloaded fromftp:///pub/ex200/kernelUname –rLftp Cd /put/ex200Get kernelExitYum localinstall kernelVim /boot/grub/grub.conf 验证是否有多个KERNEL破解root 密码Init 5虚拟机开启防火墙解除System-config-firewall (图形化)选distable 关闭Iptables –L 查看是否清楚默认规则Selinux 状态设置Vim /etc/selinux/config。