20160429 리눅스 관리자

=========================================메모=========================================
=========================================복습=========================================
=========================================강의=========================================

9. 백업과 복구
 tar CMD
  # tar cvf file.tar file1 file2 file3
  # tar tvf file.tar
  # tar xvf file.tar

  # tar cvzf file.tar.gz file1 file2 file3
  # tar tvzf file.tar.gz
  # tar xvzf file.tar.gz

  # tar cvjf file.tar.bz2 file1 file2 file3
  # tar tvjf file.tar.bz2
  # tar xvjf file.tar.bz2

=========================================실습=========================================

[EX4] tar 명령어를 이용한 운영체제 전체 백업

운영체제를 백업하기 위해서 /proc, /mnt, /media, tmp 디렉토리는 포함하지 않아도 된다. 제외할 디렉토리의
경우 ‘--exclude=’로 영역을 지정해준다. 지정된 영역을 제외한 나머지 부분이 ‘<백업파일명>.tar.gz'으로
백업되는 것이다.

(명령어 형식)
# tar cvzpf /backup<백업파일명>.tar.gz --exclude=<제외할 디렉토리> --absolute-name /

# du -sh /
# df -h

# time tar cvzf /RootBackup/full_backup.tar.gz \
> --exclude=/proc \
> --exclude=/tmp \
> --exclude=/media \
> --exclude=/RootBackup \
> --absolute-name /

(생략)
/lib/libm.so.6
/lib/libcidn-2.5.so
/lib/libglib-2.0.so.0.1200.3
/lib/libdmraid.so
/lib/libgcc_s.so.1
/lib/libdevmapper-event.so.1.02
/lib/libattr.so.1
/lib/libdbus-1.so.3.4.0
/lib/libpam.so.0
tar: Error exit delayed from previous errors

real    11m1.348s
user    3m17.448s
sys     0m56.964s

rsync 서비스를 이용한 백업

(1) rsync 서비스를 이용한 로컬 데이터 백업 및 서버 동기화

여러 대의 서버를 분산하여 서버 데이터를 동기화하는데 rsync 유틸리티가 많이 사용된다. rsync는 루트 권한없 이 서버로부터 데이터로 빠르게 전송받을 수 있으며, 원격 서버와 미러 서버와 전송 데이터를 비교하여 변화된
데이터를 저장할 수 있다. 또한 SSH를 이용하면 rsync 서버가 구축되어 있지 않아도 미러링을 할 수 있는 이점 이 있다.

rsync 서버는 xinetd 방식으로 동작한다.

----- ServerA -----                ----- ServerB -----
rsync --daemon(873)         
/etc/rsyncd.conf

/Mirror_Backup   <------------------>    /Backup
                                      # rsync -avz --delete -e ssh ServerA:/Mirror_Backup /Backup

(a) rsync 서버 설정 과정
(ㄱ) /etc/rsyncd.conf 생성
(ㄴ) /etc/xinetd.d/rsync 수정
(ㄷ) xinetd 서비스 재시작

(b) rsync 클라이언트
(ㄱ) rsync 명령어를 이용한다.

(2) rsync 명령어

(명령어 형식)
# rsync -avz --delete -e ssh <원격서버:데이터경로>[SRC] <백업경로>[DEST] (source -> destination)
# rsync -avz --delete -e ssh 192.168.0.250:/backup /backup

Options
 -a, --archive               archive mode; same as -rlptgoD (no -H)
 -v, --verbose               increase verbosity
 -z, --compress              compress file data during the transfer
     --delete                delete files that don't exist on the sending side
 -r, --recursive             recurse into directories
 -I, --ignore-times          don't skip files that match in size and mod-time
 -p, --perms                 preserve permissions
 -o, --owner                 preserve owner (super-user only)
 -g, --group                 preserve group
 -t, --times                 preserve times
 -D                          same as --devices --specials

[EX1] 로컬서버의 로컬 디렉토리와 로컬 디렉토리 동기화

(명령어 형식)

# rsync -avz --delete -e ssh /backup/ /test101/
# rsync -avz --delete -e ssh /backup/ /test101

# rsync -avz --delete -e ssh /backup  /test101

# rsync -avz --delete -e ssh IP:/backup/ /test100/
# rsync -avz --delete -e ssh IP:/backup/ /test100

# rsync -avz --delete -e ssh IP:/backup /test100

만약 rsync 프로그램이 설치되어 있지 않다면 프로그램을 설치해 준다.
# rpm -q rsync
# yum install rsync

[root@linux220 ~]# df -h
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/sda1     ext3     36G  3.7G   30G  11% /
/dev/sda8     ext3    487M   11M  451M   3% /data1
/dev/sda7     ext3    487M   11M  451M   3% /data2
/dev/sda6     ext3    487M   11M  451M   3% /data3
/dev/sda5     ext3    487M   11M  451M   3% /data4
/dev/sda3     ext3    487M   11M  451M   3% /home
tmpfs        tmpfs    506M     0  506M   0% /dev/shm
/dev/hdc   iso9660    3.9G  3.9G     0 100% /media/CentOS_5.5_Final
[root@linux220 ~]# ls /backup
back-0419.tar.gz    home.0428_205001.tar.gz  incremental2.tar.gz
backup.list         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log          home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz  incremental1.tar.gz      lv1.tar.gz
[root@linux220 ~]#
[root@linux220 ~]# ls /RootBackup
full_backup.tar.gz
[root@linux220 ~]# rsync -avz --delete -e ssh 172.16.6.220:/backup /test100
ssh: connect to host 172.16.6.220 port 22: Connection refused
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(600) [receiver=3.0.6]
[root@linux220 ~]# ls /test100
ls: /test100: 그런 파일이나 디렉토리가 없음
[root@linux220 ~]# vi /etc/profile
[root@linux220 ~]# cat /etc/profile
# /etc/profile

# System wide environment and startup programs, for login setup
# Functions and aliases go in /etc/bashrc

pathmunge () {
        if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
           if [ "$2" = "after" ] ; then
              PATH=$PATH:$1
           else
              PATH=$1:$PATH
           fi
        fi
}

# ksh workaround
if [ -z "$EUID" -a -x /usr/bin/id ]; then
        EUID=`id -u`
        UID=`id -ru`
fi

# Path manipulation
if [ "$EUID" = "0" ]; then
        pathmunge /sbin
        pathmunge /usr/sbin
        pathmunge /usr/local/sbin
fi

# No core files by default
ulimit -S -c 0 > /dev/null 2>&1

if [ -x /usr/bin/id ]; then
        USER="`id -un`"
        LOGNAME=$USER
        MAIL="/var/spool/mail/$USER"
fi

HOSTNAME=`/bin/hostname`
HISTSIZE=1000

if [ -z "$INPUTRC" -a ! -f "$HOME/.inputrc" ]; then
    INPUTRC=/etc/inputrc
fi

export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE INPUTRC

for i in /etc/profile.d/*.sh ; do
    if [ -r "$i" ]; then
        if [ "$PS1" ]; then
            . $i
        else
            . $i >/dev/null 2>&1
        fi
    fi
done

unset i
unset pathmunge

#
# (1) Sfecific Configuration
#
export HISTTIMEFORMAT="%F %T     "
[root@linux220 ~]# cd /etc/profile.d
[root@linux220 /etc/profile.d]# pwd
/etc/profile.d
[root@linux220 /etc/profile.d]# ls
colorls.csh  gnome-ssh-askpass.csh  lang.csh  test.sh
colorls.sh   gnome-ssh-askpass.sh   lang.sh   vim.csh
glib2.csh    krb5-workstation.csh   less.csh  vim.sh
glib2.sh     krb5-workstation.sh    less.sh   which-2.sh
[root@linux220 /etc/profile.d]# rm -f test.sh
[root@linux220 /etc/profile.d]# cd
[root@linux220 ~]# ls
Desktop           bin          install.log.syslog  workspace
RPM-GPG-KEY-test  dead.letter  mbox                yum.log
anaconda-ks.cfg   install.log  mnt
[root@linux220 ~]# vi ~/.bash_profile
[root@linux220 ~]# cat ~/.bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin
PATH=$PATH:/test

export PATH
unset USERNAME
[root@linux220 ~]# vi ~/.bashrc
[root@linux220 ~]# cat ~/.bashrc
# .bashrc

# User specific aliases and functions

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi

#
# Specific Configuration
#
export PS1='[\u@\h \w]\$ '
alias ls='ls --color=tty -h'
alias pps='ps -ef | head -1 ; ps -ef | grep $1'
alias vi='/usr/bin/vim'
alias grep='grep -i --color'
alias a='cd /test && rm -rf /test/*'
alias b='cp /etc/passwd file1 ; cp file1 file2 ; cp file1 file3'
alias c='clear'
alias df='df -h -T'
[root@linux220 ~]# telnet localhost
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.

    linux220.example.com (Linux release 2.6.18-409.el5 #1 SMP Tue Mar 15 18:22:22 EDT 2016) (3)

login: root
Password:
Last login: Fri Apr 29 16:06:09 on :0
You have mail.
|---> /etc/bashrc read
[root@linux220 ~]# exit
logout
|---> ~/.bash_logout read
Connection closed by foreign host.
[root@linux220 ~]# vi /etc/bashrc
[root@linux220 ~]# cat /etc/bashrc
# /etc/bashrc

# System wide functions and aliases
# Environment stuff goes in /etc/profile

# By default, we want this to get set.
# Even for non-interactive, non-login shells.
if [ $UID -gt 99 ] && [ "`id -gn`" = "`id -un`" ]; then
        umask 002
else
        umask 022
fi

# are we an interactive shell?
if [ "$PS1" ]; then
    case $TERM in
        xterm*)
                if [ -e /etc/sysconfig/bash-prompt-xterm ]; then
                        PROMPT_COMMAND=/etc/sysconfig/bash-prompt-xterm
                else
                PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}"; echo -ne "\007"'
                fi
                ;;
        screen)
                if [ -e /etc/sysconfig/bash-prompt-screen ]; then
                        PROMPT_COMMAND=/etc/sysconfig/bash-prompt-screen
                else
                PROMPT_COMMAND='echo -ne "\033_${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}"; echo -ne "\033\\"'
                fi
                ;;
        *)
                [ -e /etc/sysconfig/bash-prompt-default ] && PROMPT_COMMAND=/etc/sysconfig/bash-prompt-default
            ;;
    esac
    # Turn on checkwinsize
    shopt -s checkwinsize
    [ "$PS1" = "\\s-\\v\\\$ " ] && PS1="[\u@\h \W]\\$ "
fi

if ! shopt -q login_shell ; then # We're not a login shell
        # Need to redefine pathmunge, it get's undefined at the end of /etc/profile
    pathmunge () {
                if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
                        if [ "$2" = "after" ] ; then
                                PATH=$PATH:$1
                        else
                                PATH=$1:$PATH
                        fi
                fi
        }

        # Only display echos from profile.d scripts if we are no login shell
    # and interactive - otherwise just process them to set envvars
    for i in /etc/profile.d/*.sh; do
        if [ -r "$i" ]; then
            if [ "$PS1" ]; then
                . $i
            else
                . $i >/dev/null 2>&1
            fi
        fi
    done

        unset i
        unset pathmunge
fi
# vim:ts=4:sw=4
[root@linux220 ~]#
[root@linux220 ~]# bash
[root@linux220 ~]# ps
  PID TTY          TIME CMD
 5188 pts/2    00:00:00 bash
 5297 pts/2    00:00:00 bash
 5309 pts/2    00:00:00 ps
[root@linux220 ~]# exit
exit

[root@linux220 ~]# chkconfig sshd on
[root@linux220 ~]# service sshd restart
sshd 를 정지 중:                                           [실패]
sshd (을)를 시작 중:                                       [  OK  ]

② /backup(원본) 디렉토리와 /test100/backup(미러) 디렉토리를 동기화

[root@linux220 ~]# rsync -avz --delete -e ssh 172.16.6.220:/backup /test100
receiving incremental file list
created directory /test100
backup/
backup/back-0419.tar.gz
backup/backup.list
backup/backup.log
backup/full_backup.tar.gz
backup/home.0428_205001.tar.gz
backup/home.0428_205101.tar.gz
backup/home.0428_205201.tar.gz
backup/incremental1.tar.gz
backup/incremental2.tar.gz
backup/incremental3.tar.gz
backup/linux220.tar.gz
backup/lv1.tar.gz

sent 243 bytes  received 7407857 bytes  4938733.33 bytes/sec
total size is 7404478  speedup is 1.00
[root@linux220 ~]# ls /test100
backup
[root@linux220 ~]# ls /backup /test100/backup
/backup:
back-0419.tar.gz    home.0428_205001.tar.gz  incremental2.tar.gz
backup.list         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log          home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz  incremental1.tar.gz      lv1.tar.gz

/test100/backup:
back-0419.tar.gz    home.0428_205001.tar.gz  incremental2.tar.gz
backup.list         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log          home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz  incremental1.tar.gz      lv1.tar.gz

③ /backup 디렉토리에서 backup.list 파일 삭제

[root@linux220 ~]# rm -rf /backup/backup.list
[root@linux220 ~]# ls /backup
back-0419.tar.gz         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log               home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz       incremental1.tar.gz      lv1.tar.gz
home.0428_205001.tar.gz  incremental2.tar.gz

④ /backup(원본) 디렉토리와 /test100/backup(미러) 디렉토리를 동기화

[root@linux220 ~]# rsync -avz --delete -e ssh 172.16.6.220:/backup /test100
receiving incremental file list
deleting backup/backup.list
backup/

sent 15 bytes  received 356 bytes  742.00 bytes/sec
total size is 7404349  speedup is 19957.81
[root@linux220 ~]# ls /backup /test100/backup
/backup:
back-0419.tar.gz         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log               home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz       incremental1.tar.gz      lv1.tar.gz
home.0428_205001.tar.gz  incremental2.tar.gz

/test100/backup:
back-0419.tar.gz         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log               home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz       incremental1.tar.gz      lv1.tar.gz
home.0428_205001.tar.gz  incremental2.tar.gz
[root@linux220 ~]#

⑤ 로컬에 존재하는 디렉토리 미러링

[root@linux220 ~]# rsync -avz --delete -e ssh 172.16.6.220:/backup/ /test101/
receiving incremental file list
created directory /test101
./
back-0419.tar.gz
backup.log
full_backup.tar.gz
home.0428_205001.tar.gz
home.0428_205101.tar.gz
home.0428_205201.tar.gz
incremental1.tar.gz
incremental2.tar.gz
incremental3.tar.gz
linux220.tar.gz
lv1.tar.gz

sent 223 bytes  received 7407647 bytes  14815740.00 bytes/sec
total size is 7404349  speedup is 1.00

[root@linux220 ~]# ls /backup /test101
/backup:
back-0419.tar.gz         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log               home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz       incremental1.tar.gz      lv1.tar.gz
home.0428_205001.tar.gz  incremental2.tar.gz

/test101:
back-0419.tar.gz         home.0428_205101.tar.gz  incremental3.tar.gz
backup.log               home.0428_205201.tar.gz  linux220.tar.gz
full_backup.tar.gz       incremental1.tar.gz      lv1.tar.gz
home.0428_205001.tar.gz  incremental2.tar.gz

(주의) 아래 사항의 차이점을 이해 해야 한다.

# rsync -avz --delete -e ssh /backup/ /test101/  (# rsync -avz --delete -e ssh /backup/ /test101)
-> (ㄱ) /test101 디렉토리가 없으면 생성된다.
-> (ㄴ) /backup 디렉토리의 내용과 /test101 디렉토리의 내용은 동일하다. (/backup = /test101)

# rsync -avz --delete -e ssh /backup /test101
-> (ㄱ) /test101 디렉토리가 없으면 생성된다.
-> (ㄴ) /test101 디렉토리안에 backup 디렉토리가 생성된다. (/backup = /test101/backup)

[EX2] rsync 서버 구축 및 rsync 명령어 사용

ssh를 이용한 rsync데이터 동기화를 위해서는 서버에 ssh서버가 작동 하고 있어야 한다.
rsync 서버를 구축하기 위해서는  rsync 설정파일인 /etc/rsyncd.conf 파일을 설정해야 한다.

(a) rsync 서버 설정 과정 (SRC)
(ㄱ) /etc/rsyncd.conf 생성
(ㄴ) /etc/xinetd.d/rsync 수정
(ㄷ) xinetd 서비스 재시작

(b) rsync 클라이언트 (DEST)
(ㄱ) rsync 명령어를 이용한다.

[root@linux220 ~]# rpm -q rsync
rsync-3.0.6-6.el5_11
[root@linux220 ~]# rpm -ql rsync
/etc/xinetd.d/rsync
/usr/bin/rsync
/usr/share/doc/rsync-3.0.6
/usr/share/doc/rsync-3.0.6/COPYING
/usr/share/doc/rsync-3.0.6/NEWS
/usr/share/doc/rsync-3.0.6/OLDNEWS
/usr/share/doc/rsync-3.0.6/README
/usr/share/doc/rsync-3.0.6/support
/usr/share/doc/rsync-3.0.6/support/Makefile
/usr/share/doc/rsync-3.0.6/support/atomic-rsync
/usr/share/doc/rsync-3.0.6/support/cvs2includes
/usr/share/doc/rsync-3.0.6/support/deny-rsync
/usr/share/doc/rsync-3.0.6/support/file-attr-restore
/usr/share/doc/rsync-3.0.6/support/files-to-excludes
/usr/share/doc/rsync-3.0.6/support/git-set-file-times
/usr/share/doc/rsync-3.0.6/support/logfilter
/usr/share/doc/rsync-3.0.6/support/lsh
/usr/share/doc/rsync-3.0.6/support/mnt-excl
/usr/share/doc/rsync-3.0.6/support/munge-symlinks
/usr/share/doc/rsync-3.0.6/support/rrsync
/usr/share/doc/rsync-3.0.6/support/rsyncstats
/usr/share/doc/rsync-3.0.6/support/savetransfer.c
/usr/share/doc/rsync-3.0.6/tech_report.tex
/usr/share/man/man1/rsync.1.gz
/usr/share/man/man5/rsyncd.conf.5.gz
[root@linux220 ~]# man rsyncd.conf
Formatting page, please wait...
[root@linux220 ~]# scp 172.16.9.252:/etc/rsyncd.conf /etc/rsyncd.conf
root@172.16.9.252's password:
rsyncd.conf                                   100%  133     0.1KB/s   00:00   
[root@linux220 ~]# vi /etc/rsyncd.conf
[root@linux220 ~]# caat /etc/rsyncd.conf
bash: caat: command not found
[root@linux220 ~]# cat /etc/rsyncd.conf
uid=nobody
gid=nobody
user chroot=no
max connections=30
timeout=600

[Backup]
comment=Rsync Backup Server
path=/backup1
read only=no
[root@linux220 ~]# mkdir /backup1 /backup2
[root@linux220 ~]# vi /etc/xinetd.d/rsync
[root@linux220 ~]# cat /etc/xinetd.d/rsync
# default: off
# description: The rsync server is a good addition to an ftp server, as it \
#       allows crc checksumming etc.
service rsync
{
        disable = no
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/bin/rsync
        server_args     = --daemon
        log_on_failure  += USERID
}
[root@linux220 ~]# disable = yes -> no
[root@linux220 ~]# service xinetd restart
xinetd 를 정지 중:                                         [  OK  ]
xinetd (을)를 시작 중:                                     [  OK  ]
[root@linux220 ~]# cat /etc/services | grep rsync
rsync           873/tcp                         # rsync
rsync           873/udp                         # rsync
airsync         2175/tcp                        # Microsoft Desktop AirSync Protocol
airsync         2175/udp                        # Microsoft Desktop AirSync Protocol
[root@linux220 ~]# telnet localhost 873
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
@RSYNCD: 30.0
quit
@ERROR: protocol startup error
Connection closed by foreign host.
[root@linux220 ~]#

④ 클라이언트에서 rsync 명령어 수행
----- 172.16.9.252 -----                    ----- 172.16.6.220 -----
      /backup1/(내용)    -----------------> # rsync -avz --delete -e ssh 192.168.0.250::Backup /backup1

(At linux252.example.com) 172.16.9.252
# cp -r /etc/init.d/* /backup1
# ls  /backup1

(At linux220.example.com) 172.16.6.220
# rsync -avz --delete -e ssh 172.16.9.252::Backup /backup1
(# rsync -avz --delete -e ssh 172.16.9.252:/backup1/ /backup1/)
:서비스명 = /경로 (/etc/rsyncd.conf 에 정의가 되어있음)
:Backup = /backup1

[root@linux220 ~]# rsync -avz --delete -e ssh 172.16.9.252::Backup /backup1
root@172.16.9.252's password:
receiving incremental file list
./
NetworkManager
acpid
anacron
apmd
atd
auditd
autofs
avahi-daemon
avahi-dnsconfd
bluetooth
capi
conman
cpuspeed
crond
cups
cups-config-daemon
dc_client
dc_server
dhcpd
dhcrelay
dnsmasq
dovecot
dund
firstboot
functions
gpm
haldaemon
halt
hidd
hplip
hsqldb
httpd
ibmasm
innd
ip6tables
iptables
irda
irqbalance
iscsi
iscsid
isdn
kdump
killall
krb524
kudzu
lisa
lm_sensors
lvm2-monitor
mcstrans
mdmonitor
mdmpd
messagebus
microcode_ctl
multipathd
named
netconsole
netfs
netplugd
network
new
nfs
nfslock
nscd
ntpd
oddjobd
openibd
pand
pcscd
portmap
psacct
rawdevices
rdisc
readahead_early
readahead_later
restorecond
rpcgssd
rpcidmapd
rpcsvcgssd
rwhod
saslauthd
sendmail
setroubleshoot
single
smartd
smb
spamassassin
squid
sshd
syslog
tcsd
tux
vmware-tools
vmware-tools-thinprint
vncserver
vsftpd
wdaemon
winbind
wpa_supplicant
xfs
xinetd
ypbind
yum-cron
yum-updatesd

sent 1988 bytes  received 138965 bytes  56381.20 bytes/sec
total size is 357507  speedup is 2.54
[root@linux220 ~]#

[root@linux220 ~]# ls /backup1
NetworkManager      haldaemon     microcode_ctl    rwhod
acpid               halt          multipathd       saslauthd
anacron             hidd          named            sendmail
apmd                hplip         netconsole       setroubleshoot
atd                 hsqldb        netfs            single
auditd              httpd         netplugd         smartd
autofs              ibmasm        network          smb
avahi-daemon        innd          new              spamassassin
avahi-dnsconfd      ip6tables     nfs              squid
bluetooth           iptables      nfslock          sshd
capi                irda          nscd             syslog
conman              irqbalance    ntpd             tcsd
cpuspeed            iscsi         oddjobd          tux
crond               iscsid        openibd          vmware-tools
cups                isdn          pand             vmware-tools-thinprint
cups-config-daemon  kdump         pcscd            vncserver
dc_client           killall       portmap          vsftpd
dc_server           krb524        psacct           wdaemon
dhcpd               kudzu         rawdevices       winbind
dhcrelay            lisa          rdisc            wpa_supplicant
dnsmasq             lm_sensors    readahead_early  xfs
dovecot             lvm2-monitor  readahead_later  xinetd
dund                mcstrans      restorecond      ypbind
firstboot           mdmonitor     rpcgssd          yum-cron
functions           mdmpd         rpcidmapd        yum-updatesd
gpm                 messagebus    rpcsvcgssd

(At linux252.example.com) 172.16.9.252
# cd /backup1
# rm -r [a-v]*
# ls

(At linux220.example.com) 172.16.6.220
# rsync -avz --delete -e ssh 172.16.9.252::Backup /backup1

[root@linux220 ~]# rsync -avz --delete -e ssh 172.16.9.252::Backup /backup1
root@172.16.9.252's password:
receiving incremental file list
deleting vsftpd
deleting vncserver
deleting vmware-tools-thinprint
deleting vmware-tools
deleting tux
deleting tcsd
deleting syslog
deleting sshd
deleting squid
deleting spamassassin
deleting smb
deleting smartd
deleting single
deleting setroubleshoot
deleting sendmail
deleting saslauthd
deleting rwhod
deleting rpcsvcgssd
deleting rpcidmapd
deleting rpcgssd
deleting restorecond
deleting readahead_later
deleting readahead_early
deleting rdisc
deleting rawdevices
deleting psacct
deleting portmap
deleting pcscd
deleting pand
deleting openibd
deleting oddjobd
deleting ntpd
deleting nscd
deleting nfslock
deleting nfs
deleting new
deleting network
deleting netplugd
deleting netfs
deleting netconsole
deleting named
deleting multipathd
deleting microcode_ctl
deleting messagebus
deleting mdmpd
deleting mdmonitor
deleting mcstrans
deleting lvm2-monitor
deleting lm_sensors
deleting lisa
deleting kudzu
deleting krb524
deleting killall
deleting kdump
deleting isdn
deleting iscsid
deleting iscsi
deleting irqbalance
deleting irda
deleting iptables
deleting ip6tables
deleting innd
deleting ibmasm
deleting httpd
deleting hsqldb
deleting hplip
deleting hidd
deleting halt
deleting haldaemon
deleting gpm
deleting functions
deleting firstboot
deleting dund
deleting dovecot
deleting dnsmasq
deleting dhcrelay
deleting dhcpd
deleting dc_server
deleting dc_client
deleting cups-config-daemon
deleting cups
deleting crond
deleting cpuspeed
deleting conman
deleting capi
deleting bluetooth
deleting avahi-dnsconfd
deleting avahi-daemon
deleting autofs
deleting auditd
deleting atd
deleting apmd
deleting anacron
deleting acpid
deleting NetworkManager
./

sent 31 bytes  received 167 bytes  56.57 bytes/sec
total size is 18734  speedup is 94.62
[root@linux220 ~]# ls /backup1
wdaemon  winbind  wpa_supplicant  xfs  xinetd  ypbind  yum-cron  yum-updatesd

(주의) 다음 명령어는 한대의 클라이언트에서만 수행한다.
# cp -r /backup1 /linuxXXX        (XXX: 자신 서버의 자리번호, 예: linux200)
# rsync -avz --delete -e ssh /linuxXXX 172.16.9.252:/backup2

[root@linux220 ~]# cp -r /backup1 /linux220
[root@linux220 ~]# rsync -avz --delete -e ssh /linux220 172.16.9.252:/backup2
root@172.16.9.252's password:
sending incremental file list
linux220/
linux220/wdaemon
linux220/winbind
linux220/wpa_supplicant
linux220/xfs
linux220/xinetd
linux220/ypbind
linux220/yum-cron
linux220/yum-updatesd

sent 8218 bytes  received 168 bytes  2396.00 bytes/sec
total size is 18734  speedup is 2.23

[root@linux220 ~]# ssh 172.16.9.252 ls /backup2
root@172.16.9.252's password:
linux200
linux202
linux204
linux205
linux206
linux207
linux210
linux211
linux212
linux213
linux217
linux218
linux220
linux223
linux224
linux227

리눅스어드민 끝.