0.查看libc.so.6默认版本

  
  ubuntu 20 X86        : strings /lib/x86_64-linux-gnu/libc.so.6 |grep GLIBC_
  ubuntu 20 arm64    : strings /lib/aarch64-linux-gnu/libc.so.6 | grep GLIBC_

1.换源

  
  deb https://mirrors.aliyun.com/ubuntu-ports/ focal main restricted universe multiverse
  deb-src https://mirrors.aliyun.com/ubuntu-ports/ focal main restricted universe multiverse
  ​
  deb https://mirrors.aliyun.com/ubuntu-ports/ focal-security main restricted universe multiverse
  deb-src https://mirrors.aliyun.com/ubuntu-ports/ focal-security main restricted universe multiverse
  ​
  deb https://mirrors.aliyun.com/ubuntu-ports/ focal-updates main restricted universe multiverse
  deb-src https://mirrors.aliyun.com/ubuntu-ports/ focal-updates main restricted universe multiverse
  ​
  # deb https://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
  # deb-src https://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
  ​
  deb https://mirrors.aliyun.com/ubuntu-ports/ focal-backports main restricted universe multiverse
  deb-src https://mirrors.aliyun.com/ubuntu-ports/ focal-backports main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu-ports/ jammy main

注：重点为deb http://mirrors.aliyun.com/ubuntu-ports/ jammy main源

2.更新源

  
  apt-get update

3.升级libc

  
  apt install libc6
  ​

升级过程中会出现重启服务的提示，选择默认的yes即可。

4.查看libc.so.6版本

  root@ok3588:~# strings /lib/aarch64-linux-gnu/libc.so.6 | grep GLIBC_
  GLIBC_2.17
  GLIBC_2.18
  GLIBC_2.22
  GLIBC_2.23
  GLIBC_2.24
  GLIBC_2.25
  GLIBC_2.26
  GLIBC_2.27
  GLIBC_2.28
  GLIBC_2.29
  GLIBC_2.30
  GLIBC_2.31
  GLIBC_2.32
  GLIBC_2.33
  GLIBC_2.34
  GLIBC_2.35
  GLIBC_PRIVATE