Shulou(Shulou.com)06/03 Report--

Problem description:

Set up the hadoop environment in the local area network, and the node / home is mounted on a separate disk. Due to a power outage, several nodes / home file systems are damaged and cannot be recovered. You can only remount / home after formatting, and then use scripts to quickly restore many hadoop users.

Source quotation: "Brother Bird's Private Cuisine" manually creates the user process:

First create the required group (vi / etc/group)

Synchronize / etc/group with / etc/gshadow (grpconv)

Create various attributes of the account (vi / etc/passwd)

Synchronize / etc/passwd with / etc/shadow (pwconv)

The password to create the account (passwd accountname)

Create a user home directory (cp-a / etc/skel / home/accountname)

Change the properties of the user's home directory (chown-R accountname.group / home/accountname).

Because only the / home file is corrupted, you only need to proceed to steps 6 and 7, as shown in the script:

#! / bin/bash

For user in `cat / etc/passwd | tail-20 | awk-F:'{print $1}'`; do

Mkdir-pv / home/$user

Cp-a / etc/skel/.bash_profile / home/$user

Cp-a / etc/skel/.bash_logout / home/$user

Cp-a / etc/skel/.bashrc / home/$user

Chown-R $user:$user / home/$user

Done

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