2016年RHEL7 ：RHCSA试题答案整理
本帖最后由 mayiwen123456 于 2017-11-28 17:48 编辑RHCSA考试：破解root密码# e# console=tty0 rd.break# ctrl + x# mount -o remount,rw /sysroot#chroot /sysroot/#passwd root#touch /.autorelable#exit 两次
设置主机名、ip地址、子网掩码、DNS服务器~]#vim /etc/hostname~]#hostname HOSTNAME~]#bash方法一：~]# nmtui方法二：# vim/etc/sysconfig/network-scripts/ifcfg-.en0BOOTPROTO=staticONBOOT=yesIPADDR0=GATEWAY0=DNS1=~]#systemctl restart network检查;~]#ip addr show 172.25.0.10/24~]#ip route~]#cat /etc/resolve.conf 172.25.254.254~]#ping
1.Selinux设置在Enforcing~]# vim /etc/selinux/configSELINUX=disabledSELINUXTYPE=targeted~]# reboot重启让SElinux重新配置生效 或者setenforce 1 设置为强制
2.配置yum源~]# vim /etc/yum.repos.d/xxx.reponame=baseurl=enable=1gpgchck=0
3.调整逻辑卷~]# cat /etc/fstab # 看其分区文件格式~]#lvextend /dev/vg/xxxxx -L 300M重读文件系统：XFS：~]# xfs_growfs 挂载点EXT4：]# resize2fs分区
4.创建用户和组~]#groupadd adminuser~]#useradd -G adminuser natasha~]#useradd -G adminuser harry~]#useradd -s /sbin/nologin sarah~]#echo "RedHat" | passwd --stdin natasha~]#echo "redhat" | passwd --stdin harry~]#echo "redhat" | passwd --stdin sarah
5.复制并配置权限~]#cp/etc/fstab /var/tmp/fstab~]#chown root.root /var/tmp/fstab~]#chown a-x /var/tmp/fstab~]#setfacl -m u:natasha:rw /var/tmp/fstab~]#setfacl -m u:natasha:--- /var/tmp/fstab
6.cron job ~]#crontab -e -u natasha23 14 * * * /bin/echo hjya
7.创建目录更改权限~]#mkdir -pv /home/admins ~]#chown .adminuser /home/adminuser~]#chmod g+w/home/adminuser~]#chmod o-rx/home/adminuser~]#chmod g+s /home/adminuser~]#ll -d /home/adminsdrwxrws---
8.YUM升级内核~]#vim vim /etc/yum.repos.d/xxx.reponame=baseurl=http://server.domain11.example.com/pub/updatesenable=gpgcheck=~]#uname -r ~]#yum install kernel~]#reboot
9.LDAP服务~]# id ldapuser1# 此时会下那是为空用户~]# yum installsssd authconfig-gtk -y # sssd服务、认证图形化界面~]# authconfig-gtk & 图形化配置 复制相关内容10.NTP服务~]#yum install chrony -y~]#yum install -ysystem-config-date ~]#system-config-date &
~]# chronyc sources -v
11.autofs自动挂载LDAP~]#yum install -y autofs~]# systemctl enable autofs# 开机启动~]# getent passwd ldapuser1 # 查看用户的信息，关键是看其挂载位置~]#vim /etc/auto.master增加：/home/guests /etc/auto.ldap说明：/home/guests服务目录，该目录不需要创建，由autofs自动创建~]#vim/etc/auto.ldapldapuser1 172.25.254.254:/home/guests/ldapuser1或者：* 172.25.254.254:/home/guests/&~]#systemctl restart autofs~]#su -ldapuser1
12.创建用户修改密码~]#useradd -u 3400 alex~]#echo "redhat" | passwd --stdin alex
13.创建交换分区~]# fdisk /dev/vda 此处一定要创建为扩展分区，方便下面的题目；新建逻辑分区修改为~]#partprobe /dev/vda~]#makeswap/dev/vda5~]#vim /fstabUUID= swap swap 0 0~]#reboot~]# fdisk -l # 验证swap分区大小
14.find应用~]#mkdir -pv /root/findresults~]#find / -user ira -execcp -rfp {}/root/findresults/\;
15.复制行：cat + 管道重定向~]# cat/usr/share/dict/words | grep seismic > /root/lines
16.tar压缩~]# tar jvcf /root/backup.tar.bz2 /etc/*
17.创建逻辑卷卷组：datastore 16M 默认4M逻辑卷组：database 10个PE挂载点：/mnt/database文件系统格式：ext4~]#fdisk /dev/vda8e~]#pvcreate /dev/vda6~]#vgcreatedatastore-s 16M/dev/vda6~]# vgdisplay datastore # 查看~]#lvcreate -n database -l 10 datestore~]#lvdisplay /dev/dastore/database~]#mkfs.ext4 /dev/dastore/database~]#mkdir /database~]#blkid /dev/datastore/database~]#vim/fstab~]#mount -a~]# df -hT重启下看下
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