刪除Linux的依賴庫並進入救援模式恢復

刪除Linux的依賴庫並進入救援模式恢復

模擬一下依賴庫檔案被刪，並進入救援模式恢復

系統：CentOS7

一、刪除mv的依賴庫檔案

刪除/lib64/libc.so.6

[root@centos7 Packages]# which mv
alias mv='mv -i'
    /usr/bin/mv
[root@centos7 Packages]# ldd /usr/bin/mv
    linux-vdso.so.1 =>  (0x00007ffd51946000)
    libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f40c2bd9000)
    libacl.so.1 => /lib64/libacl.so.1 (0x00007f40c29d0000)
    libattr.so.1 => /lib64/libattr.so.1 (0x00007f40c27cb000)
    libc.so.6 => /lib64/libc.so.6 (0x00007f40c23fe000)
    libpcre.so.1 => /lib64/libpcre.so.1 (0x00007f40c219c000)
    libdl.so.2 => /lib64/libdl.so.2 (0x00007f40c1f98000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f40c2e00000)
    libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f40c1d7c000)
[root@centos7 Packages]# rm -f /lib64/libc.so.6 

刪除後mv等很多命令變無法使用

[root@centos7 Packages]# mv /etc/fstab .
mv: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
[root@centos7 Packages]# cp /etc/fstab .
cp: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
[root@centos7 Packages]# poweroff
poweroff: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory

二、強制關機，從光碟引導

0、進BIOS從光碟引導

1、Troubleshooting

2、Recure a CentOS system（救援模式）

3、輸入1,回車

4、提示系統被掛載到了/mnt/sysimage，按下回車

5、把光碟的庫檔案複製過來

使用cp複製庫檔案到/mnt/sysimage/lib64/;千萬別mv，否則光碟的系統又壞了

三、重新啟動後的系統已經正常使用

[root@centos7 ~]# cp /etc/fstab . -a
cp: overwrite ‘./fstab’? y
[root@centos7 ~]# mv fstab /tmp