一、CIFS
  1.CIFS系统：Internet文件共享系统，也称服务器信；适用于MicrosoftWindows服务器和客户端的标准文件和打印机的共享系统息块（SMB）
  2.Samba服务：用于将linux文件系统作为CIFS/SMB网络文件进行共享，并将linux打印机作为CIFS/SMB打印机进行共享

二、Smb服务
 

 1.安装smb服务

  samba          ##服务端
  samba-common
  samba-client

 2.打开smb，列出共享文件系统信息

[root@localhost ~]# systemctl start smb

[root@localhost ~]# smbclient -L //172.25.254.108

Enter root's password:
Anonymous login successful
Domain=[MYGROUP] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)
Anonymous login successful
Domain=[MYGROUP] OS=[Unix] Server=[Samba 4.1.1]

    Server               Comment
    ---------            -------

    Workgroup            Master
    ---------            -------

 3.设置默认域名  [global]

 89         workgroup = WESTOS

 90         server string = Samba Server Version %v

 4.设置黑白名单  [global]

 96 ;       hosts allow = 172.25.254.8 172.25.254.108

      

 97 ;       hosts deny  = 172.25.254.8 172.25.254.108

      

 5.设置用户登陆  ##注意：必须是本地用户
[root@localhost ~]# useradd tom
[root@localhost ~]# useradd jerry

[root@localhost ~]# smbpasswd -a tom  ##添加tom用户

New SMB password:
Retype new SMB password:
Added user tom.

[root@localhost ~]# smbpasswd -a jerry  ##添加jerry用户

New SMB password:
Retype new SMB password:
Added user jerry.
[root@localhost ~]# pdbedit -L   ##列出smb用户
tom:1001:
jerry:1002:

[root@localhost ~]# pdbedit -x jerry  ##删除jerry用户

[root@localhost ~]# pdbedit -L
tom:1001:

 6.使用用户登陆

[root@localhost ~]# smbclient -L //172.25.254.108 -U tom

Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)

    tom             Disk      Home Directories

三、Smb的Selinx保护

 当Selinux=Disable时
 1.进入用户家目录编辑

[root@localhost ~]# smbclient //172.25.254.108/tom -U tom

Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

smb: \> ls  ##列出远程文件

  .                                   D        0  Thu May  3 21:46:28 2018
  ..                                  D        0  Thu May  3 21:46:34 2018
  .bash_profile                       H      193  Wed Jan 29 07:45:18 2014
  .mozilla                           DH        0  Thu Jul 10 18:29:32 2014
  .config                            DH        0  Thu Jul 10 19:06:52 2014
  .bashrc                             H      231  Wed Jan 29 07:45:18 2014
  .bash_logout                        H       18  Wed Jan 29 07:45:18 2014

smb: \> !ls  ##列出本地主机文件
anaconda-ks.cfg  Documents  Music     Public     Videos
Desktop         Downloads  Pictures  Templates

smb: \> put anaconda-ks.cfg  ##上传

putting file anaconda-ks.cfg as \anaconda-ks.cfg (8416.2 kb/s) (average 8417.0 kb/s)

smb: \> rm anaconda-ks.cfg  ##删除

smb: \> ?   ##列出smb可以使用的命令

?              allinfo        altname        archive        backup         
blocksize      cancel         case_sensitive cd             chmod          
chown          close          del            dir            du             
echo           exit           get            getfacl        geteas    

 2.挂载

[root@localhost ~]# mount -o username=tom,password=123 //172.25.254.108/tom /mnt

[root@localhost ~]# df
Filesystem           1K-blocks    Used Available Use% Mounted on
/dev/vda1             10473900 3186240   7287660  31% /
devtmpfs                469344       0    469344   0% /dev
tmpfs                   484932     140    484792   1% /dev/shm
tmpfs                   484932   12828    472104   3% /run
tmpfs                   484932       0    484932   0% /sys/fs/cgroup
/dev/mapper/vg0-vo      483670    2361    451818   1% /home
/dev/sr0               3654720 3654720         0 100% /run/media/root/RHEL-7.0 Server.x86_64

//172.25.254.108/tom    483670    2361    451818   1% /mnt

 3.设置开机自动挂载
[root@localhost ~]# vim /etc/fstab

//172.25.254.108/tom /mnt cifs defaults,username=tom,password=123 0 0

当Selinux=Enforing时  ##注意：smb处于开启状态

samba_enable_home_dirs  ##允许本地主目录作为CIFS文件共享
use_samba_home_dirs     ##允许挂载远程CIFS文件共享并将其用作本地主目录
samba_share_t           ##smb共享目录的selinux安全上下文
samba_export_all_ro     ##共享目录只读
samba_export_all_rw     ##允许共享目录读写

 1.进入用户家目录编辑
[root@localhost ~]# smbclient //172.25.254.108/tom -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls

NT_STATUS_ACCESS_DENIED listing \*

 2.修改sebool值，进入用户家目录编辑

[root@localhost ~]# setsebool -P samba_enable_home_dirs on

[root@localhost ~]# smbclient //172.25.254.108/tom -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
  .                                   D        0  Thu May  3 21:49:51 2018
  ..                                  D        0  Thu May  3 21:46:34 2018
  .bash_profile                       H      193  Wed Jan 29 07:45:18 2014
  .mozilla                           DH        0  Thu Jul 10 18:29:32 2014
  .config                            DH        0  Thu Jul 10 19:06:52 2014
  .bashrc                             H      231  Wed Jan 29 07:45:18 2014
  .bash_logout                        H       18  Wed Jan 29 07:45:18 2014

        60458 blocks of size 8192. 56476 blocks available

 3.共享目录
 用户建立目录:
  修改配置文件，共享tets目录

[root@localhost ~]# mkdir /test

[root@localhost ~]# vim /etc/samba/smb.conf

        [test]
        comment = test directory
        path    =/test
  重启smb，可以看到test目录共享信息
[root@localhost ~]# systemctl restart smb.service
[root@localhost ~]# smbclient -L //172.25.254.108/
Enter root's password:
Anonymous login successful
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    test            Disk      test directory
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)
  但是，tom用户登陆无法编辑
[root@localhost ~]# smbclient  //172.25.254.108/test -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
NT_STATUS_ACCESS_DENIED listing \*
  修改test目录的安全上下文，重启后再次登陆编辑

[root@localhost ~]# semanage fcontext -a -t samba_share_t '/test(/.*)?'

[root@localhost ~]# restorecon -RvvF /test/
restorecon reset /test context unconfined_u:object_r:default_t:s0->system_u:object_r:samba_share_t:s0
[root@localhost ~]# systemctl restart smb.service

[root@localhost ~]# smbclient  //172.25.254.108/test -U tom

Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
  .                                   D        0  Thu May  3 22:48:51 2018
  ..                                  D        0  Thu May  3 22:48:51 2018

系统目录：
  修改配置文件，共享mnt系统目录
[root@localhost ~]# vim /etc/samba/smb.conf
    [mnt]
        comment = mnt test directory

        path    =/mnt

  重启后查看共享目录信息
[root@localhost ~]# systemctl restart smb.service
[root@localhost ~]# smbclient -L //172.25.254.108/
Enter root's password:
Anonymous login successful
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    test            Disk      test directory
    mnt             Disk      mnt test directory

    IPC$            IPC       IPC Service (Samba Server Version 4.1.1）

  设定samba的sebool值，打开所有共享目录的读写权限
[root@localhost ~]# setsebool samba_export_all_rw 1

[root@localhost ~]# smbclient  //172.25.254.108/mnt -U tom

Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
  .                                   D        0  Thu May 11 20:23:52 2017
  ..                                  D        0  Thu May  3 22:48:51 2018

四、多用户挂载

 1.指定用户具备读写权限  
[root@localhost ~]# vim /etc/samba/smb.conf
        [test]
        comment = test directory
        path    =/test
        write list =tom      ##只有tom用户具备权限
        ##writable = yes     ##所有用户具备权限

        ##write list =@tom   ##只有tom组的用户具备权限

 2.设定共享目录的读写权限，重启后测试
[root@localhost ~]# chmod 777 /test/
[root@localhost ~]# systemctl restart smb.service
 只有tom用户具备权限

[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=tom,password=123

[root@localhost ~]# touch /mnt/file1
[root@localhost ~]# rm -rf /mnt/file1
 挂载jerry用户，不具备权限
[root@localhost ~]# umount /mnt
[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=jerry,password=123
[root@localhost ~]# touch /mnt/file2

touch: cannot touch ‘/mnt/file2’: Permission denied

 3.用户相关权限设置
    security = user
        passdb backend = tdbsam

        map to guest = bad user  ##匿名用户映射为guest

        [test]
        comment = test directory
        path    =/test
        writeanle = yes
        browseable = no    ##不显示test共享目录

        guest ok = yes     ##允许匿名用户登陆

        admin users =student  ##studet用户编辑时以root用户身份

 匿名用户登陆

[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=guest

[root@localhost ~]# df
//172.25.254.108/test  10473900 3186684   7287216  31% /mnt

//172.25.254.108/test on /mnt type cifs (rw,relatime,vers=1.0,cache=strict,username=guest,domain=LOCALHOST,uid=0,noforceuid,gid=0,noforcegid,addr=172.25.254.108,unix,posixpaths,serverino,acl,rsize=1048576,wsize=65536,actimeo=1)

 不显示test共享目录，但是不影响使用

Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    mnt             Disk      mnt test directory

    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)

 以student身份挂载，建立文件

[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=student,password=123

[root@localhost ~]# touch /mnt/fire00
[root@localhost ~]# ll /mnt
total 0
-rw-r--r--. 1 root student 0 May  4 00:31 fire00

 4.实现多用户挂载
 安装 cifs-utils 软件
 配置用户文件 vim /root/samba
 查看帮助 man mount.cifs
 多用户挂载 mount -o credentials=/root/samba,sec=ntlmssp,multiuer //172.25.254.108/test /mnt
 此时root用户
[root@foundation8 ~]# cd /mnt/
[root@foundation8 mnt]# ls
file  file123  filetest
[root@foundation8 mnt]# rm -fr file123
rm: cannot remove ‘file123’: Permission denied
[root@foundation8 mnt]# touch test
touch: cannot touch ‘test’: Permission denied

 而普通用户
[kiosk@foundation8 yum.repos.d]$ cd /mnt
[kiosk@foundation8 mnt]$ ls
ls: reading directory .: Permission denied

 普通用户认证  ##跟/test权限有关
[kiosk@foundation8 mnt]$ cifscreds add -u tom 172.25.254.108
Password:
[kiosk@foundation8 mnt]$ ls
file  file123  filetest
[kiosk@foundation8 mnt]$ rm -fr file
rm: cannot remove ‘file’: Permission denied
一、CIFS
  1.CIFS系统：Internet文件共享系统，也称服务器信；适用于MicrosoftWindows服务器和客户端的标准文件和打印机的共享系统息块（SMB）
  2.Samba服务：用于将linux文件系统作为CIFS/SMB网络文件进行共享，并将linux打印机作为CIFS/SMB打印机进行共享

二、Smb服务
 
 1.安装smb服务
  samba          ##服务端
  samba-common
  samba-client

 2.打开smb，列出共享文件系统信息
[root@localhost ~]# systemctl start smb
[root@localhost ~]# smbclient -L //172.25.254.108
Enter root's password:
Anonymous login successful
Domain=[MYGROUP] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)
Anonymous login successful
Domain=[MYGROUP] OS=[Unix] Server=[Samba 4.1.1]

    Server               Comment
    ---------            -------

    Workgroup            Master
    ---------            -------

 3.设置默认域名  [global]
 89         workgroup = WESTOS
 90         server string = Samba Server Version %v

 4.设置黑白名单  [global]
 96 ;       hosts allow = 172.25.254.8 172.25.254.108       
 97 ;       hosts deny  = 172.25.254.8 172.25.254.108       

 5.设置用户登陆  ##注意：必须是本地用户
[root@localhost ~]# useradd tom
[root@localhost ~]# useradd jerry
[root@localhost ~]# smbpasswd -a tom  ##添加tom用户
New SMB password:
Retype new SMB password:
Added user tom.
[root@localhost ~]# smbpasswd -a jerry  ##添加jerry用户
New SMB password:
Retype new SMB password:
Added user jerry.
[root@localhost ~]# pdbedit -L   ##列出smb用户
tom:1001:
jerry:1002:
[root@localhost ~]# pdbedit -x jerry  ##删除jerry用户
[root@localhost ~]# pdbedit -L
tom:1001:

 6.使用用户登陆
[root@localhost ~]# smbclient -L //172.25.254.108 -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)
    tom             Disk      Home Directories

三、Smb的Selinx保护

 当Selinux=Disable时
 1.进入用户家目录编辑
[root@localhost ~]# smbclient //172.25.254.108/tom -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls  ##列出远程文件
  .                                   D        0  Thu May  3 21:46:28 2018
  ..                                  D        0  Thu May  3 21:46:34 2018
  .bash_profile                       H      193  Wed Jan 29 07:45:18 2014
  .mozilla                           DH        0  Thu Jul 10 18:29:32 2014
  .config                            DH        0  Thu Jul 10 19:06:52 2014
  .bashrc                             H      231  Wed Jan 29 07:45:18 2014
  .bash_logout                        H       18  Wed Jan 29 07:45:18 2014

smb: \> !ls  ##列出本地主机文件
anaconda-ks.cfg  Documents  Music     Public     Videos
Desktop         Downloads  Pictures  Templates

smb: \> put anaconda-ks.cfg  ##上传
putting file anaconda-ks.cfg as \anaconda-ks.cfg (8416.2 kb/s) (average 8417.0 kb/s)

smb: \> rm anaconda-ks.cfg  ##删除

smb: \> ?   ##列出smb可以使用的命令
?              allinfo        altname        archive        backup         
blocksize      cancel         case_sensitive cd             chmod          
chown          close          del            dir            du             
echo           exit           get            getfacl        geteas    

 2.挂载
[root@localhost ~]# mount -o username=tom,password=123 //172.25.254.108/tom /mnt
[root@localhost ~]# df
Filesystem           1K-blocks    Used Available Use% Mounted on
/dev/vda1             10473900 3186240   7287660  31% /
devtmpfs                469344       0    469344   0% /dev
tmpfs                   484932     140    484792   1% /dev/shm
tmpfs                   484932   12828    472104   3% /run
tmpfs                   484932       0    484932   0% /sys/fs/cgroup
/dev/mapper/vg0-vo      483670    2361    451818   1% /home
/dev/sr0               3654720 3654720         0 100% /run/media/root/RHEL-7.0 Server.x86_64
//172.25.254.108/tom    483670    2361    451818   1% /mnt

 3.设置开机自动挂载
[root@localhost ~]# vim /etc/fstab
//172.25.254.108/tom /mnt cifs defaults,username=tom,password=123 0 0

当Selinux=Enforing时  ##注意：smb处于开启状态
samba_enable_home_dirs  ##允许本地主目录作为CIFS文件共享
use_samba_home_dirs     ##允许挂载远程CIFS文件共享并将其用作本地主目录
samba_share_t           ##smb共享目录的selinux安全上下文
samba_export_all_ro     ##共享目录只读
samba_export_all_rw     ##允许共享目录读写

 1.进入用户家目录编辑
[root@localhost ~]# smbclient //172.25.254.108/tom -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
NT_STATUS_ACCESS_DENIED listing \*

 2.修改sebool值，进入用户家目录编辑
[root@localhost ~]# setsebool -P samba_enable_home_dirs on
[root@localhost ~]# smbclient //172.25.254.108/tom -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
  .                                   D        0  Thu May  3 21:49:51 2018
  ..                                  D        0  Thu May  3 21:46:34 2018
  .bash_profile                       H      193  Wed Jan 29 07:45:18 2014
  .mozilla                           DH        0  Thu Jul 10 18:29:32 2014
  .config                            DH        0  Thu Jul 10 19:06:52 2014
  .bashrc                             H      231  Wed Jan 29 07:45:18 2014
  .bash_logout                        H       18  Wed Jan 29 07:45:18 2014

        60458 blocks of size 8192. 56476 blocks available

 3.共享目录
 用户建立目录:
  修改配置文件，共享tets目录
[root@localhost ~]# mkdir /test
[root@localhost ~]# vim /etc/samba/smb.conf
        [test]
        comment = test directory
        path    =/test
  重启smb，可以看到test目录共享信息
[root@localhost ~]# systemctl restart smb.service
[root@localhost ~]# smbclient -L //172.25.254.108/
Enter root's password:
Anonymous login successful
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Co mment
    ---------       ----      -------
    test            Disk      test directory
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)
  但是，tom用户登陆无法编辑
[root@localhost ~]# smbclient  //172.25.254.108/test -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
NT_STATUS_ACCESS_DENIED listing \*
  修改test目录的安全上下文，重启后再次登陆编辑
[root@localhost ~]# semanage fcontext -a -t samba_share_t '/test(/.*)?'
[root@localhost ~]# restorecon -RvvF /test/
restorecon reset /test context unconfined_u:object_r:default_t:s0->system_u:object_r:samba_share_t:s0
[root@localhost ~]# systemctl restart smb.service
[root@localhost ~]# smbclient  //172.25.254.108/test -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
  .                                   D        0  Thu May  3 22:48:51 2018
  ..                                  D        0  Thu May  3 22:48:51 2018

系统目录：
  修改配置文件，共享mnt系统目录
[root@localhost ~]# vim /etc/samba/smb.conf
    [mnt]
        comment = mnt test directory
        path    =/mnt
  重启后查看共享目录信息
[root@localhost ~]# systemctl restart smb.service
[root@localhost ~]# smbclient -L //172.25.254.108/
Enter root's password:
Anonymous login successful
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    test            Disk      test directory
    mnt             Disk      mnt test directory
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1）
  设定samba的sebool值，打开所有共享目录的读写权限
[root@localhost ~]# setsebool samba_export_all_rw 1
[root@localhost ~]# smbclient  //172.25.254.108/mnt -U tom
Enter tom's password:
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
  .                                   D        0  Thu May 11 20:23:52 2017
  ..                                  D        0  Thu May  3 22:48:51 2018

四、多用户挂载

 1.指定用户具备读写权限  
[root@localhost ~]# vim /etc/samba/smb.conf
        [test]
        comment = test directory
        path    =/test
        write list =tom      ##只有tom用户具备权限
        ##writable = yes     ##所有用户具备权限

        ##write list =@tom   ##只有tom组的用户具备权限

 2.设定共享目录的读写权限，重启后测试

[root@localhost ~]# chmod 777 /test/

[root@localhost ~]# systemctl restart smb.service
 只有tom用户具备权限  注意 selinux的权限
[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=tom,password=123
[root@localhost ~]# touch /mnt/file1
[root@localhost ~]# rm -rf /mnt/file1
 挂载jerry用户，不具备权限
[root@localhost ~]# umount /mnt
[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=jerry,password=123
[root@localhost ~]# touch /mnt/file2
touch: cannot touch ‘/mnt/file2’: Permission denied

 3.用户相关权限设置
    security = user
        passdb backend = tdbsam

        map to guest = bad user  ##匿名用户映射为guest

        [test]
        comment = test directory
        path    =/test
        writeanle = yes
        browseable = no    ##不显示test共享目录
        guest ok = yes     ##允许匿名用户登陆

        admin users =student  ##studet用户编辑时以root用户身份

 匿名用户登陆

[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=guest

[root@localhost ~]# df
//172.25.254.108/test  10473900 3186684   7287216  31% /mnt

//172.25.254.108/test on /mnt type cifs (rw,relatime,vers=1.0,cache=strict,username=guest,domain=LOCALHOST,uid=0,noforceuid,gid=0,noforcegid,addr=172.25.254.108,unix,posixpaths,serverino,acl,rsize=1048576,wsize=65536,actimeo=1)

 不显示test共享目录，但是不影响使用
Domain=[WESTOS] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------       ----      -------
    mnt             Disk      mnt test directory
    IPC$            IPC       IPC Service (Samba Server Version 4.1.1)
 以student身份挂载，建立文件
[root@localhost ~]# mount //172.25.254.108/test /mnt -o username=student,password=123
[root@localhost ~]# touch /mnt/fire00
[root@localhost ~]# ll /mnt
total 0
-rw-r--r--. 1 root student 0 May  4 00:31 fire00

 4.实现多用户挂载

 安装 cifs-utils 软件

 配置用户文件 vim /root/samba

 查看帮助 man mount.cifs

 多用户挂载 mount -o credentials=/root/samba,sec=ntlmssp,multiuer //172.25.254.108/test /mnt

 此时root用户
[root@foundation8 ~]# cd /mnt/
[root@foundation8 mnt]# ls
file  file123  filetest
[root@foundation8 mnt]# rm -fr file123
rm: cannot remove ‘file123’: Permission denied
[root@foundation8 mnt]# touch test

touch: cannot touch ‘test’: Permission denied

 而普通用户
[kiosk@foundation8 yum.repos.d]$ cd /mnt
[kiosk@foundation8 mnt]$ ls
ls: reading directory .: Permission denied

 普通用户认证  ##跟/test权限有关
[kiosk@foundation8 mnt]$ cifscreds add -u tom 172.25.254.108
Password:
[kiosk@foundation8 mnt]$ ls
file  file123  filetest
[kiosk@foundation8 mnt]$ rm -fr file
rm: cannot remove ‘file’: Permission denied