mail邮箱服务器搭建: [root@zhujd ~]# dnf install -y postfix dovecot cyrus-sasl[root@zhujd ~]# vim /etc/postfix/main.cf#如下图所示，修改文件内容，保存并退出
在最后加上下图内容
[root@zhujd ~]# vim /etc/dovecot/dovecot.conf #如下图所示，修改文件内容，保存并退出
[root@zhujd ~]# vim /etc/dovecot/conf.d/10-mail.conf #如下图所示，修改文件内容，保存并退出
[root@zhujd ~]# vim /etc/dovecot/conf.d/10-ssl.conf
[root@zhujd ~]# vim /etc/sysconfig/saslauthd [root@zhujd ~]# mkdir -p /home/client1/mail/.imap/INBOX[root@zhujd ~]# systemctl restart postfix.service [root@zhujd ~]# systemctl restart dovecot[root@zhujd ~]# systemctl restart saslauthd
2. samba服务器搭建
创建public共享项，path目录/opt/share，实现所有用户可读（匿名访问），
只有admin组和teacher用户可以写，并且默认创建的文件权限为644，目录为755；
[root@zhujd ~]# yum install -y samba samba-client cifs-utils[root@zhujd ~]# vim /etc/samba/smb.conf #配置samba配置文件#如下图所示，修改文件内容，保存并退出
#添加linux用户[root@zhujd ~]# useradd teacher#添加linux组[root@zhujd ~]# groupadd admin[root@zhujd ~]# smbpasswd -a teacherNew SMB password:123456Retype new SMB password:123456[root@zhujd ~]# systemctl stop firewalld.service [root@zhujd ~]# setenforce 0[root@zhujd ~]# systemctl restart smb
验证：
断开连接
3. lvm
lvm 硬盘 -> pv -> vg -> lv -> 格式化 -> 挂载 -> 使用[root@zhujd ~]# lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTsr0 11:0 1 7.9G 0 rom nvme0n1 259:0 0 40G 0 disk ├─nvme0n1p1 259:1 0 400M 0 part /boot└─nvme0n1p2 259:2 0 39.6G 0 part ├─rhel-root 253:0 0 26.4G 0 lvm / └─rhel-swap 253:1 0 13.2G 0 lvm [SWAP]nvme0n2 259:3 0 1G 0 disk nvme0n3 259:4 0 1G 0 disk #创建物理卷（PV）[root@zhujd ~]# pvcreate /dev/nvme0n2 /dev/nvme0n3 Physical volume "/dev/nvme0n2" successfully created. Physical volume "/dev/nvme0n3" successfully created.#查看物理卷（PV）[root@zhujd ~]# pvscan PV /dev/nvme0n1p2 VG rhel lvm2 [<39.61 GiB / 0 free] PV /dev/nvme0n2 lvm2 [1.00 GiB] PV /dev/nvme0n3 lvm2 [1.00 GiB] Total: 3 [<41.61 GiB] / in use: 1 [<39.61 GiB] / in no VG: 2 [2.00 GiB]#创建卷组[root@zhujd ~]# vgcreate vg1 /dev/nvme0n2 /dev/nvme0n3 Volume group "vg1" successfully created#查看卷组[root@zhujd ~]# vgscan Found volume group "vg1" using metadata type lvm2#创建逻辑卷lv1，属于vg1[root@zhujd ~]# lvcreate -L 200M -n lv1 vg1 Logical volume "lv1" created.#创建逻辑卷lv2，属于vg1[root@zhujd ~]# lvcreate -l 100 -n lv2 vg1 Logical volume "lv2" created.#查看逻辑卷[root@zhujd ~]# lvscan ACTIVE '/dev/vg1/lv1' [200.00 MiB] inherit ACTIVE '/dev/vg1/lv2' [400.00 MiB] inherit ACTIVE '/dev/rhel/root' [<26.37 GiB] inherit ACTIVE '/dev/rhel/swap' [<13.24 GiB] inherit #格式化逻辑卷，将逻辑卷lv1格式化为ext4的文件系统。[root@zhujd ~]# mkfs.ext4 /dev/vg1/lv1mke2fs 1.45.4 (23-Sep-2019)Creating filesystem with 204800 1k blocks and 51200 inodesFilesystem UUID: c41bcbe2-8fae-43c7-bb9e-af51ef69897eSuperblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729Allocating group tables: done Writing inode tables: done Creating journal (4096 blocks): doneWriting superblocks and filesystem accounting information: done #减少[root@zhujd ~]# lvresize -l -25 /dev/vg1/lv1#扩容[root@zhujd ~]# lvresize -L +100M /dev/vg1/lv1