Linux User Migration

One: Purpose.

Existing server users, fully migrating to a new server.

II: Environment:

Source: 117

Cat/etc/redhat-release

CentOS Release 6.9 (Final)

Rpm-qa rsync

Rsync-3.0.6-12.el6.x86_64

Purpose 114

Cat/etc/redhat-release

CentOS Linux release 7.2.1511 (Core)

Three:

117:

Export ugidlimit=500//Set a variable, the new UID starts at 500.

Awk-v limit= $UGIDLIMIT-F: ' ($3>=limit) && ($3!=65534) '/etc/passwd >/root/move/passwd.mig

Awk-v limit= $UGIDLIMIT-F: ' ($3>=limit) && ($3!=65534) '/etc/group >/root/move/group.mig

Awk-v limit= $UGIDLIMIT-F: ' ($3>=limit) && ($3!=65534) {print $} '/etc/passwd | Tee-|egrep-f-/etc/shadow >/root/move/shadow.mig

Cp/etc/gshadow/root/move/gshadow.mig

RSYNC-E ssh-avpr/root/move/[Email protected]:/tmp/temp//Copy the old server's 4 files to the new server.

RSYNC-E ssh-avpr/home [Email protected]:///Copy the entire home directory on the old server to the new server.

This example does not consider/var/spool/mail

Four: 114:

Cat Passwd.mig >>/etc/passwd

Cat Group.mig >>/etc/group

Cat Shadow.mig >>/etc/shadow

CP Gshadow.mig/etc/gshadow

[[email protected] home]# Ls-sail/etc/{passwd,group,shadow,gshadow}

135184942 4-rw-r--r--. 1 root root 731 12:38/etc/group

135184896 4----------. 1 root root 509 12:39/etc/gshadow

135411669 4-rw-r--r--. 1 root root 1598 12:38/etc/passwd

135411670 4----------. 1 root root 1854 12:38/etc/shadow

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Linux User Migration