Aliyun Centos/debian Install the FTP software and set

First, Redhat/centos installation vsftp software

1. Update Yum Source

First need to update the system Yum source, convenient tool download address: http://help.aliyun.com/manual?spm=0.0.0.0.zJ3dBU&helpId=1692
2. Install Vsftp
Install vsftp using the Yum command
#yum Install Vsftpd-y
3. Add FTP Account and directory
Check the position of the nologin first, usually under/usr/sbin/nologin or/sbin/nologin.
Use the following command to create an account that specifies the home directory of/alidata/www/wwwroot as the user pwftp you can define your own account name and directory:
#useradd-D/alidata/www/wwwroot-s/sbin/nologin pwftp
Modify the account password:
#passwd pwftp
Modify permissions for the specified directory
#chown-R Pwftp.pwftp/alidata/www/wwwroot
4. Configure Vsftp
Edit the Vsftp configuration file with the following command:
#vi/etc/vsftpd/vsftpd.conf
Change "Anonymous_enable=yes" to "Anonymous_enable=no" in the configuration file
Remove the annotation symbol before the following configuration:
Local_enable=yes
Write_enable=yes
Chroot_local_user=yes
Save changes, press ESC, enter: WQ
5. Modify Shell Configuration
VI Edit/etc/shells, if there is no/usr/sbin/nologin or/sbin/nologin in the file (see the current system configuration) append it
6. Start vsftp Service and test login
To start the VSFTP service with a command:
#service vsftpd Start
Then use the Account PWFTP test whether can log on FTP. The directory is/alidata/www/wwwroot.

Second, Ubuntu/debian installation vsftp software

1. Update the SOFTWARE source
First need to update the system's software source, convenient tool download address: http://help.aliyun.com/manual?spm=0.0.0.0.zJ3dBU&helpId=1692
2. Install Vsftp
Install vsftp using the Apt-get command
#apt-get Install Vsftpd-y
3. Add FTP Account and directory
Check the position of the nologin first, usually under/usr/sbin/nologin or/sbin/nologin.
Use the following command to create an account that specifies the home directory of/alidata/www/wwwroot as the user pwftp you can define your own account name and directory:
#useradd-D/alidata/www/wwwroot-s/sbin/nologin pwftp
Modify the account password:
#passwd pwftp
Modify permissions for the specified directory
#chown-R Pwftp.pwftp/alidata/www/wwwroot
4. Configure Vsftp
Edit the Vsftp configuration file with the following command:
#vi/etc/vsftpd.conf
Change "Anonymous_enable=yes" to "Anonymous_enable=no" in the configuration file
Remove the annotation symbol before the following configuration:
Local_enable=yes
Write_enable=yes
Chroot_local_user=yes
Chroot_list_enable=yes
Chroot_list_file=/etc/vsftpd.chroot_list
Save exit
Edit/etc/vsftpd.chroot_list file, add FTP account name, save exit
5. Modify Shell Configuration
VI Edit/etc/shells, if there is no/usr/sbin/nologin or/sbin/nologin in the file (see the current system configuration) append it
6. Restart VSFTP service and test login
To start the VSFTP service with a command:
#service vsftpd Restart
Then use the Account PWFTP test whether can log on FTP. The directory is/alidata/www/wwwroot.

installed, let's say Linux user management , Linux User management The most important two files is/etc/passwd and/etc/shadow, the former is to save account related, the latter is to save the password.
    unscramble The passwd file, one line for a user, each field separated by a colon ":" such as:
    root:x:0:0:root:/root:/bin/ Bash
    These 7 fields represent:
1. Account name: That is, the user name when landing
2. Password: Because this file is all users can read, so late into X and the real password changed into/etc/shadow
3. UID: User id,uid Unique, usually uid=0 representing root admin
4. GID: Group ID, related to/etc/group,/etc/group is similar to/etc/passwd, which is used to standardize user group information
5. User Information Description Bar: The role of note accounts
6. Home directory: House directory, That is, user login to jump to the root directory, such as root user/root is its home directory after the first home "~"
7. Shell: The shell that the user uses, usually use/bin/bash this shell
    said the principle of user management, the next FTP configuration, can be much clearer.

VSFTP Operation Process:
1. Add FTP Account and directory
First check the position of the nologin, usually under/usr/sbin/nologin or/sbin/nologin, the system under/sbin/nologin.
To create an account command:
#useradd-D/alidata/www/juhuibu-s/sbin/nologin Ftpuser
(This command specifies the home directory of/alidata/www/juhuibu as the user Ftpuser, and can define the account name and directory yourself)
Modify the account password:
#passwd Ftpuser
(Enter two times password after return)
To modify permissions for the specified directory:
#chown-R Ftpuser.ftpuser/alidata/www/juhuibu
(The specified directory's recursive permissions are all for that user)

2. Configure Vsftp
Edit the Vsftp configuration file with the following command:
#vi/etc/vsftpd/vsftpd.conf
Change "Anonymous_enable=yes" to "Anonymous_enable=no" in the configuration file
Remove the annotation symbol before the following configuration:
Local_enable=yes
Write_enable=yes
Chroot_local_user=yes
Save changes, press ESC, enter: WQ

3. Modify Shell Configuration
VI Edit/etc/shells, if there is no/usr/sbin/nologin or/sbin/nologin in the file (see the current system configuration) append it

4. Restart the VSFTP service and test the login
Restart the VSFTP service using the command: #service vsftpd restart

Finally in the Linux vsftp end configuration even if completed, account Ftpuser can log on FTP. The top-level directory to log in is/alidata/www/juhuibu