Linux学习第六周

一、自建yum仓库，分别为网络源和本地源；

配置本地源
  1. 建立本地源目录；
   [root@localhost ~]#mkdir /mnt/cdrom
   [root@localhost ~]#mkdir /yum
  1. 挂载Centos光盘；
   [root@localhost ~]#mount /dev/cdrom /mnt/cdrom
   [root@localhost ~]cp -r /mnt/cdrom/* /yum
  1. 备份repo；
   [root@localhost ~]#cd /etc/yum.repo.d/
   [root@localhost yum.repos.d]#mkdir backup
   [root@localhost yum.repos.d]#mv CentOS-Base.repo CentOS-CR.repo CentOS-Vault.repo CentOS-Vault.repo ./backup
  1. 编辑Centos-Media.repo；
  [root@localhost yum.repos.d]#cat Centos-Media.repo

[base]
name=Centos
baseurl=file:///yum
enable=1
gpgckeck=0
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-CentOS-7
  1. 清除yum缓存；
 [root@localhost yum.repos.d]#yum clean all
配置网络源
  1. 备份源镜像文件；
    [root@localhost yum.repos.d]# mv centos* ./backup
  1. 下载阿里云的镜像到/etc/yum.repos.d/；
    [root@localhost yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo

(地址：http://mirrors.aliyun.com/repo/Centos-7.repo)

  1. 清除yum缓存；
    [root@localhost yum.repos.d]# yum clean all
    [root@localhost yum.repos.d]# yum makecache

二、编译安装http2.4，实现可以正常访问；

关闭防火墙和selinux：https://www.jianshu.com/p/97c3c4012c4c

1、在 Apache 官网下载最新版的http2.4

2、服务器端下载；

[root@localhost yum.repos.d]# cd /usr/local/src
[root@localhost src]# wget https://mirrors.tuna.tsinghua.edu.cn/apache//httpd/httpd-2.4.43.tar.gz
--2020-07-14 14:43:05--  https://mirrors.tuna.tsinghua.edu.cn/apache//httpd/httpd-2.4.43.tar.gz
正在解析主机 mirrors.tuna.tsinghua.edu.cn (mirrors.tuna.tsinghua.edu.cn)... 101.6.8.193, 2402:f000:1:408:8100::1
正在连接 mirrors.tuna.tsinghua.edu.cn (mirrors.tuna.tsinghua.edu.cn)|101.6.8.193|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：9348230 (8.9M) [application/x-gzip]
正在保存至: “httpd-2.4.43.tar.gz”

100%[==============================================================================================>] 9,348,230   1.96MB/s 用时 4.5s

2020-07-14 14:43:10 (1.96 MB/s) - 已保存 “httpd-2.4.43.tar.gz” [9348230/9348230])

[root@localhost src]# ls
httpd-2.4.43.tar.gz  nginx-1.14.2  nginx-1.14.2.tar.gz

3、解包；

[root@localhost src]# tar xzvf httpd-2.4.43.tar.gz
[root@localhost src]# ll
总用量 10128
drwxr-sr-x 11 root   40    4096 3月  26 22:46 httpd-2.4.43
-rw-r--r--  1 root root 9348230 3月  30 22:21 httpd-2.4.43.tar.gz
drwxr-xr-x  9 1001 1001     186 6月  13 14:45 nginx-1.14.2
-rw-r--r--  1 root root 1015384 12月  4 2018 nginx-1.14.2.tar.gz
[root@localhost src]# cd httpd-2.4.43/
[root@localhost httpd-2.4.43]# ls
ABOUT_APACHE     ap.d          CHANGES         docs         httpd.spec      libhttpd.dep  Makefile.win   README            srclib
acinclude.m4     build         CMakeLists.txt  emacs-style  include         libhttpd.dsp  modules        README.cmake      support
Apache-apr2.dsw  BuildAll.dsp  config.layout   httpd.dep    INSTALL         libhttpd.mak  NOTICE         README.platforms  test
Apache.dsw       BuildBin.dsp  configure       httpd.dsp    InstallBin.dsp  LICENSE       NWGNUmakefile  ROADMAP           VERSIONING
apache_probes.d  buildconf     configure.in    httpd.mak    LAYOUT          Makefile.in   os             server

4、查看 README 和 INSTALL；
执行./configure --prefix=/apps/httpd24 --sysconfdir=/etc/httpd --enable-ssl --enable-so
5、可能会有依赖的包未安装，根据其提示安装即可(一般为缺啥，安装啥-devel)；

[root@localhost httpd-2.4.43]# ./configure --prefix=/apps/httpd24 --sysconfdir=/etc/httpd --enable-ssl --enable-so
checking for chosen layout... Apache
checking for working mkdir -p... yes
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
configure:
configure: Configuring Apache Portable Runtime library...
configure:
checking for APR... no
configure: error: APR not found.  Please read the documentation.
[root@localhost httpd-2.4.43]# yum install apr-devel -y

重复第4，5步 直到成功安装生成 Makefile 文件

成功
[root@localhost httpd-2.4.43]# make -j4
make
[root@localhost httpd-2.4.43]# make install
make install

6、启动访问；

[root@localhost httpd-2.4.43]# cd /apps/
httpd24/ nginx/
[root@localhost httpd-2.4.43]# cd /apps/httpd24/
[root@localhost httpd24]# ls
bin  build  cgi-bin  error  htdocs  icons  include  logs  man  manual  modules
[root@localhost httpd24]# cd bin
[root@localhost bin]# ls
ab         apxs      dbmmanage  envvars-std  htcacheclean  htdigest  httpd      logresolve
apachectl  checkgid  envvars    fcgistarter  htdbm         htpasswd  httxt2dbm  rotatelogs

[root@localhost bin]# ./apachectl
[root@localhost bin]# ps aux|grep http
root      22644  0.0  0.1  74932  2388 ?        Ss   14:57   0:00 /apps/httpd24/bin/httpd -k start
daemon    22645  0.0  0.2 429432  4216 ?        Sl   14:57   0:00 /apps/httpd24/bin/httpd -k start
daemon    22646  0.0  0.2 429432  4216 ?        Sl   14:57   0:00 /apps/httpd24/bin/httpd -k start
daemon    22647  0.0  0.2 429432  4216 ?        Sl   14:57   0:00 /apps/httpd24/bin/httpd -k start
root      22739  0.0  0.0 112824   980 pts/0    S+   14:58   0:00 grep --color=auto http
[root@localhost bin]# lsof -i:80
COMMAND   PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
httpd   22644   root    4u  IPv6  39358      0t0  TCP *:http (LISTEN)
httpd   22645 daemon    4u  IPv6  39358      0t0  TCP *:http (LISTEN)
httpd   22646 daemon    4u  IPv6  39358      0t0  TCP *:http (LISTEN)
httpd   22647 daemon    4u  IPv6  39358      0t0  TCP *:http (LISTEN)
[root@localhost bin]# curl 192.168.1.111
<html><body><h1>It works!</h1></body></html>

访问

三、创建一个2G的文件系统，块大小为2048byte，预留1%可用空间,文件系统 ext4，卷标为TEST，要求此分区开机后自动挂载至/test目录，且默认有acl挂载选项；

1、查看块设备信息；

[root@localhost ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   19G  0 part
  ├─centos-root 253:0    0   17G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   10G  0 disk
sr0              11:0    1  918M  0 rom

以下将在sdb磁盘作为操作目标
2、在sdb磁盘上创建大小为2G的分区；

[root@localhost ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xb6901c7c.

Command (m for help): n        #新建分区
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p        #创建主分区
Partition number (1-4, default 1):        #分区编号，默认回车即可
First sector (2048-20971519, default 2048):        #分区大小，默认回车即可
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): +2G        #大小2G
Partition 1 of type Linux and of size 2 GiB is set

Command (m for help): w        #保存
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   19G  0 part
  ├─centos-root 253:0    0   17G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   10G  0 disk
└─sdb1            8:17   0    2G  0 part   ############创建的2G分区
sr0              11:0    1  918M  0 rom

3、在sdb1分区上创建文件系统；

[root@localhost ~]# mkfs.ext4 -b 2048 -m 1 -L TEST /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=TEST
OS type: Linux
Block size=2048 (log=1)
Fragment size=2048 (log=1)
Stride=0 blocks, Stripe width=0 blocks
131072 inodes, 1048576 blocks
10485 blocks (1.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=269484032
64 block groups
16384 blocks per group, 16384 fragments per group
2048 inodes per group
Superblock backups stored on blocks:
        16384, 49152, 81920, 114688, 147456, 409600, 442368, 802816

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

[root@localhost ~]# blkid
/dev/sda1: UUID="61bfe580-8947-41c1-91c0-0e3422e7d468" TYPE="xfs"
/dev/sda2: UUID="e2U6Yk-baaU-nYV4-UZxe-Uewf-etbD-yBNpQX" TYPE="LVM2_member"
/dev/sdb1: LABEL="TEST" UUID="e598b458-c2ba-4bbe-a2b7-7791be1278fb" TYPE="ext4"
/dev/sr0: UUID="2018-11-25-21-21-31-00" LABEL="CentOS 7 x86_64" TYPE="iso9660" PTTYPE="dos"
/dev/mapper/centos-root: UUID="a5cdc275-8211-41ab-b6b3-3dec286dd8b9" TYPE="xfs"
/dev/mapper/centos-swap: UUID="46e70da6-8858-46a4-a187-71b59a52b95b" TYPE="swap"

4、将分区挂载到指定文件夹；

[root@localhost ~]# vim /etc/fstab

----最后一行在命令行模式执行 :r!blkid /dev/sdb1 然后回车


获取UUID
获取UUID

将粘贴的一行修改为：

UUID=e598b458-c2ba-4bbe-a2b7-7791be1278fb /test ext4 acl 0 0

5、创建目标文件夹，并手动使配置文件生效；

[root@localhost ~]# mkdir /test
[root@localhost ~]# mount -a
[root@localhost ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   19G  0 part
  ├─centos-root 253:0    0   17G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   10G  0 disk
└─sdb1            8:17   0    2G  0 part /test
sr0              11:0    1  918M  0 rom
[root@localhost ~]# df -h /test
Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb1       2.0G  9.1M  1.9G   1% /test

四、创建一个至少有两个PV组成的大小为20G的名为testvg的VG;要求PE大小 为16MB, 而后在卷组中创建大小为5G的逻辑卷testlv;挂载至/users目录；

1、查看硬盘信息；

[root@localhost ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   19G  0 part
  ├─centos-root 253:0    0   17G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   10G  0 disk
└─sdb1            8:17   0    2G  0 part /test
sdc               8:32   0   15G  0 disk
sdd               8:48   0   15G  0 disk
sr0              11:0    1  918M  0 rom

以下将使用整块sdc和sdd各10G空间共同创建物理卷组
2、在sdc和sdd硬盘上各创建10G的分区；

------sdc
[root@localhost ~]# fdisk /dev/sdc
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xddedf037.

Command (m for help): p

Disk /dev/sdc: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xddedf037

   Device Boot      Start         End      Blocks   Id  System

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-31457279, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-31457279, default 31457279): +10G
Partition 1 of type Linux and of size 10 GiB is set

Command (m for help): P

Disk /dev/sdc: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xddedf037

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048    20973567    10485760   83  Linux

Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): p

Disk /dev/sdc: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xddedf037

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048    20973567    10485760   8e  Linux LVM

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
------sdd

[root@localhost ~]# fdisk /dev/sdd
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xcf6c8040.

Command (m for help): p

Disk /dev/sdd: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xcf6c8040

   Device Boot      Start         End      Blocks   Id  System

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-31457279, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-31457279, default 31457279): +10G
Partition 1 of type Linux and of size 10 GiB is set

Command (m for help): T
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): p

Disk /dev/sdd: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xcf6c8040

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1            2048    20973567    10485760   8e  Linux LVM

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

查询硬盘信息：

[root@localhost ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   19G  0 part
  ├─centos-root 253:0    0   17G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   10G  0 disk
└─sdb1            8:17   0    2G  0 part /test
sdc               8:32   0   15G  0 disk
└─sdc1            8:33   0   10G  0 part
sdd               8:48   0   15G  0 disk
└─sdd1            8:49   0   10G  0 part
sr0              11:0    1  918M  0 rom

3、在sdc1和sdd1分区上分别创建物理卷（pv）；

[root@localhost ~]# pvcreate /dev/sdc1
  Physical volume "/dev/sdc1" successfully created.
[root@localhost ~]# pvcreate /dev/sdd1
  Physical volume "/dev/sdd1" successfully created.
[root@localhost ~]# pvs
  PV         VG     Fmt  Attr PSize   PFree
  /dev/sda2  centos lvm2 a--  <19.00g     0
  /dev/sdc1         lvm2 ---   10.00g 10.00g
  /dev/sdd1         lvm2 ---   10.00g 10.00g

4、创建物理卷组（vg）为testvg，并将以上的pv加入其中；

[root@localhost ~]# vgcreate -s 16M testvg /dev/sdc1 /dev/sdd1
  Volume group "testvg" successfully created
[root@localhost ~]# vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  centos   1   2   0 wz--n- <19.00g      0
  testvg   2   0   0 wz--n- <19.97g <19.97g

5、在testvgz中创建大小为5G的逻辑卷（lv）卷名testlv；

[root@localhost ~]# lvcreate -n testlv -L 5G testvg
  Logical volume "testlv" created.
[root@localhost ~]# lvs
  LV     VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root   centos -wi-ao---- <17.00g
  swap   centos -wi-ao----   2.00g
  testlv testvg -wi-a-----   5.00g

[root@localhost ~]# lsblk
NAME              MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                 8:0    0   20G  0 disk
├─sda1              8:1    0    1G  0 part /boot
└─sda2              8:2    0   19G  0 part
  ├─centos-root   253:0    0   17G  0 lvm  /
  └─centos-swap   253:1    0    2G  0 lvm  [SWAP]
sdb                 8:16   0   10G  0 disk
└─sdb1              8:17   0    2G  0 part /test
sdc                 8:32   0   15G  0 disk
└─sdc1              8:33   0   10G  0 part
  └─testvg-testlv 253:2    0    5G  0 lvm
sdd                 8:48   0   15G  0 disk
└─sdd1              8:49   0   10G  0 part
sr0                11:0    1  918M  0 rom

6、创建文件系统；

[root@localhost ~]# mkfs.ext4 /dev/testvg/testlv
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
327680 inodes, 1310720 blocks
65536 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1342177280
40 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

[root@localhost ~]# blkid
/dev/sda1: UUID="61bfe580-8947-41c1-91c0-0e3422e7d468" TYPE="xfs"
/dev/sda2: UUID="e2U6Yk-baaU-nYV4-UZxe-Uewf-etbD-yBNpQX" TYPE="LVM2_member"
/dev/sdb1: LABEL="TEST" UUID="e598b458-c2ba-4bbe-a2b7-7791be1278fb" TYPE="ext4"
/dev/sdc1: UUID="pPMjyj-x14w-wfFk-Sfao-XslB-BJve-yXGBrU" TYPE="LVM2_member"
/dev/sdd1: UUID="e8Kn4u-wfah-2zF1-nIdL-izYf-lIWh-KvGjje" TYPE="LVM2_member"
/dev/sr0: UUID="2018-11-25-21-21-31-00" LABEL="CentOS 7 x86_64" TYPE="iso9660" PTTYPE="dos"
/dev/mapper/centos-root: UUID="a5cdc275-8211-41ab-b6b3-3dec286dd8b9" TYPE="xfs"
/dev/mapper/centos-swap: UUID="46e70da6-8858-46a4-a187-71b59a52b95b" TYPE="swap"
/dev/mapper/testvg-testlv: UUID="94464a8b-758d-474c-bf56-55b76c425b19" TYPE="ext4"

7、在/etc/fstab配置文件中添加以下内容；
UUID=94464a8b-758d-474c-bf56-55b76c425b19 /users ext4 defaults 0 0


配置

8、创建目标文件夹，并手动使配置文件生效；

[root@localhost ~]# mkdir /users
[root@localhost ~]# mount -a
[root@localhost ~]# lsblk
NAME              MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                 8:0    0   20G  0 disk
├─sda1              8:1    0    1G  0 part /boot
└─sda2              8:2    0   19G  0 part
  ├─centos-root   253:0    0   17G  0 lvm  /
  └─centos-swap   253:1    0    2G  0 lvm  [SWAP]
sdb                 8:16   0   10G  0 disk
└─sdb1              8:17   0    2G  0 part /test
sdc                 8:32   0   15G  0 disk
└─sdc1              8:33   0   10G  0 part
  └─testvg-testlv 253:2    0    5G  0 lvm  /users
sdd                 8:48   0   15G  0 disk
└─sdd1              8:49   0   10G  0 part
sr0                11:0    1  918M  0 rom
[root@localhost ~]# df -h /users
Filesystem                 Size  Used Avail Use% Mounted on
/dev/mapper/testvg-testlv  4.8G   20M  4.6G   1% /users

至此，逻辑卷testlv已经可以正常使用了

[root@localhost ~]# cd /users
[root@localhost users]# echo "life is shit" >a.txt
[root@localhost users]# ll
total 20
-rw-r--r-- 1 root root    13 Jul 15 14:48 a.txt
drwx------ 2 root root 16384 Jul 15 14:35 lost+found
[root@localhost users]# cat a.txt
life is shit

测试：
生成一个1G的文件在/user目录

[root@localhost users]# dd if=/dev/zero of=/users bs=1G count=1
dd: failed to open ‘/users’: Is a directory
[root@localhost users]# dd if=/dev/zero of=/users/b.txt bs=1G count=1
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 21.8943 s, 49.0 MB/s
[root@localhost users]# ll -h b.txt
-rw-r--r-- 1 root root 1.0G Jul 15 14:53 b.txt
[root@localhost users]# df -h /users
Filesystem                 Size  Used Avail Use% Mounted on
/dev/mapper/testvg-testlv  4.8G  1.1G  3.6G  23% /users
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