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RHEL6误使用了RHEL7的光盘源，安装了某个RPM包之后，导致glibc被升级，进而导致系统崩溃。
yum install升级记录日志
[root@rhel65 ~]# yum install ftp
Loaded plugins: product-id, refresh-packagekit, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package ftp.x86_64 0:0.17-67.el7 will be installed
–> Processing Dependency: libc.so.6(GLIBC_2.15)(64bit) for package: ftp-0.17-67.el7.x86_64
–> Running transaction check
—> Package glibc.x86_64 0:2.12-1.132.el6 will be updated
–> Processing Dependency: glibc = 2.12-1.132.el6 for package: glibc-headers-2.12-1.132.el6.x86_64
–> Processing Dependency: glibc = 2.12-1.132.el6 for package: glibc-common-2.12-1.132.el6.x86_64
–> Processing Dependency: glibc = 2.12-1.132.el6 for package: glibc-devel-2.12-1.132.el6.x86_64
—> Package glibc.x86_64 0:2.17-157.el7 will be an update
–> Running transaction check
—> Package glibc-common.x86_64 0:2.12-1.132.el6 will be updated
—> Package glibc-common.x86_64 0:2.17-157.el7 will be an update
–> Processing Dependency: /usr/bin/bash for package: glibc-common-2.17-157.el7.x86_64
—> Package glibc-devel.x86_64 0:2.12-1.132.el6 will be updated
—> Package glibc-devel.x86_64 0:2.17-157.el7 will be an update
—> Package glibc-headers.x86_64 0:2.12-1.132.el6 will be updated
—> Package glibc-headers.x86_64 0:2.17-157.el7 will be an update
–> Running transaction check
—> Package bash.x86_64 0:4.1.2-15.el6_4 will be updated
—> Package bash.x86_64 0:4.2.46-20.el7_2 will be an update
–> Processing Conflict: bash-4.2.46-20.el7_2.x86_64 conflicts filesystem < 3
–> Restarting Dependency Resolution with new changes.
–> Running transaction check
—> Package filesystem.x86_64 0:2.4.30-3.el6 will be updated
—> Package filesystem.x86_64 0:3.2-21.el7 will be an update
–> Finished Dependency Resolution
Dependencies Resolved
===========================================================================================================
Package Arch Version Repository Size
===========================================================================================================
Installing:
ftp x86_64 0.17-67.el7 rhel73-iso 61 k
Updating:
filesystem x86_64 3.2-21.el7 rhel73-iso 1.0 M
Updating for dependencies:
bash x86_64 4.2.46-20.el7_2 rhel73-iso 1.0 M
glibc x86_64 2.17-157.el7 rhel73-iso 3.6 M
glibc-common x86_64 2.17-157.el7 rhel73-iso 11 M
glibc-devel x86_64 2.17-157.el7 rhel73-iso 1.1 M
glibc-headers x86_64 2.17-157.el7 rhel73-iso 668 k
Transaction Summary
===========================================================================================================
Install 1 Package(s)
Upgrade 6 Package(s)
Total download size: 19 M
Is this ok [y/N]: y
Downloading Packages:
———————————————————————————————————–
Total 120 MB/s | 19 MB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : glibc-2.17-157.el7.x86_64 1/13
Updating : bash-4.2.46-20.el7_2.x86_64 2/13
Updating : glibc-common-2.17-157.el7.x86_64 3/13
Updating : glibc-headers-2.17-157.el7.x86_64 4/13
Updating : glibc-devel-2.17-157.el7.x86_64 5/13
Updating : filesystem-3.2-21.el7.x86_64 6/13
Error unpacking rpm package filesystem-3.2-21.el7.x86_64
error: unpacking of archive failed on file /bin: cpio: rename
Installing : ftp-0.17-67.el7.x86_64 7/13
Cleanup : glibc-devel-2.12-1.132.el6.x86_64 8/13
Cleanup : glibc-headers-2.12-1.132.el6.x86_64 9/13
Cleanup : bash-4.1.2-15.el6_4.x86_64 10/13
Non-fatal POSTUN scriptlet failure in rpm package bash
Cleanup : glibc-common-2.12-1.132.el6.x86_64 11/13
warning: %postun(bash-4.1.2-15.el6_4.x86_64) scriptlet failed, exit status 127
Cleanup : glibc-2.12-1.132.el6.x86_64 12/13
warning: /etc/localtime saved as /etc/localtime.rpmsave
Non-fatal <unknown> scriptlet failure in rpm package glibc
rhel65-iso/productid | 1.7 kB 00:00 …
rhel73-iso/productid | 1.6 kB 00:00 …
Verifying : glibc-devel-2.17-157.el7.x86_64 1/13
Verifying : bash-4.2.46-20.el7_2.x86_64 2/13
Verifying : glibc-2.17-157.el7.x86_64 3/13
Verifying : glibc-common-2.17-157.el7.x86_64 4/13
Verifying : ftp-0.17-67.el7.x86_64 5/13
Verifying : glibc-headers-2.17-157.el7.x86_64 6/13
Verifying : glibc-2.12-1.132.el6.x86_64 7/13
Verifying : glibc-devel-2.12-1.132.el6.x86_64 8/13
Verifying : bash-4.1.2-15.el6_4.x86_64 9/13
filesystem-2.4.30-3.el6.x86_64 was supposed to be removed but is not!
Verifying : filesystem-2.4.30-3.el6.x86_64 10/13
Verifying : glibc-common-2.12-1.132.el6.x86_64 11/13
Verifying : glibc-headers-2.12-1.132.el6.x86_64 12/13
Verifying : filesystem-3.2-21.el7.x86_64 13/13
Installed:
ftp.x86_64 0:0.17-67.el7
Dependency Updated:
bash.x86_64 0:4.2.46-20.el7_2 glibc.x86_64 0:2.17-157.el7 glibc-common.x86_64 0:2.17-157.el7
glibc-devel.x86_64 0:2.17-157.el7 glibc-headers.x86_64 0:2.17-157.el7
Failed:
filesystem.x86_64 0:2.4.30-3.el6 filesystem.x86_64 0:3.2-21.el7
Complete!
此时系统已经不能正常执行reboot命令重启了，只能强制按电源重启机器。重启之后，原系统已经崩溃，进不去系统了，停在下面的界面：
然后使用RHEL6的光盘引导机器，选择rescue，进入到shell之后提示无法chroot到/mnt/sysimage，无解。
然后重启，用RHEL6安装光盘引导机器，选择Install or Update系统，进入图形后选择update已有系统，失败，如下图。
然后按ctrl+alt+F2切换到第2个console，发现原系统已经被自动挂载到/mnt/sysimage目录，尝试chroot到/mnt/sysimage，由于bash被上面依赖更新了，所以会提示找不到/bin/sh，手动把/mnt/sysimage/usr/bin/sh 拷到 /mnt/sysimage/bin/sh，再次chroot成功。
手工挂载RHEL6的ISO到/mnt/rhel65并cd到Packages目录，强制将上面更新过的几个包更新回到RHEL6的版本：
# rpm –force –nodeps -Uvh [RPM包名]
分别把bash/glibc/glibc-common/glibc-devel/glibc-headers这几个包装回去。
重启系统，发现已经可以正常进入到原系统了，最后使用yum remove把最开始安装的RHEL7的包给remove掉，问题全部解决。
更多Fedora相关信息见Fedora 专题页面 https://www.linuxidc.com/topicnews.aspx?tid=5
本文永久更新链接地址：https://www.linuxidc.com/Linux/2018-03/151146.htm
