1. RPM 명령어를 이용하여 패키지 업데이트 하기

1). 패키지 업데이트 목록
glibc-common-2.12-1.149.el6_6.5.x86_64.rpm
glibc-2.12-1.149.el6_6.5.x86_64.rpm
glibc-2.12-1.149.el6_6.5.i686.rpm
glibc-headers-2.12-1.149.el6_6.5.x86_64.rpm
glibc-devel-2.12-1.149.el6_6.5.x86_64.rpm
glibc-devel-2.12-1.149.el6_6.5.i686.rpm

2). RPM 명령어를 이용하여 패키지 업데이트
[root@20-VM src]# rpm -Uvh glibc-common-2.12-1.149.el6_6.5.x86_64.rpm glibc-2.12-1.149.el6_6.5.x86_64.rpm glibc-2.12-1.149.el6_6.5.i686.rpm glibc-headers-2.12-1.149.el6_6.5.x86_64.rpm glibc-devel-2.12-1.149.el6_6.5.x86_64.rpm glibc-devel-2.12-1.149.el6_6.5.i686.rpm

3). 업데이트 RPM 버전 확인
[root@20-VM src]# rpm -qa | grep glibc
glibc-common-2.12-1.149.el6_6.5.x86_64
compat-glibc-2.5-46.2.x86_64
glibc-2.12-1.149.el6_6.5.i686
compat-glibc-headers-2.5-46.2.x86_64
glibc-2.12-1.149.el6_6.5.x86_64
glibc-devel-2.12-1.149.el6_6.5.i686
glibc-devel-2.12-1.149.el6_6.5.x86_64
glibc-headers-2.12-1.149.el6_6.5.x86_64

2. RPM 명령어를 이용하여 패키지 다운그레이드 하기

1). 기존 패키지 확인 및 백업
# rpm -qa | grep glibc >> glibc_old.txt

2). 패키지 다운그레이드 시작
# rpm -Uvh --force glibc-common-2.12-1.132.el6.x86_64.rpm glibc-2.12-1.132.el6.x86_64.rpm glibc-2.12-1.132.el6.i686.rpm glibc-headers-2.12-1.132.el6.x86_64.rpm glibc-devel-2.12-1.132.el6.x86_64.rpm glibc-devel-2.12-1.132.el6.i686.rpm
warning: glibc-common-2.12-1.132.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
Preparing...       ########################################### [100%]
   1:glibc         ########################################### [ 17%]
   2:glibc-common  ########################################### [ 33%]
   3:glibc-headers ########################################### [ 50%]
   4:glibc         ########################################### [ 67%]
   5:glibc-devel   ########################################### [ 83%]
   6:glibc-devel   ########################################### [100%]

3). 다운그레이드 패키지 확인하기
# rpm -qa | grep glibc
glibc-common-2.12-1.132.el6.x86_64
compat-glibc-2.5-46.2.x86_64
glibc-2.12-1.132.el6.i686
compat-glibc-headers-2.5-46.2.x86_64
glibc-2.12-1.132.el6.x86_64
glibc-devel-2.12-1.132.el6.i686
glibc-devel-2.12-1.132.el6.x86_64
glibc-headers-2.12-1.132.el6.x86_64