Linux报错集锦

今天在对glibc降级时出现了问题，降级过程是先删除原来的glibc，在安装新(比原来的版本低)的glibc，但删除glibc后出大问题了....如下图
/lib64/ld-linux-x86-64.so.2: bad ELF interpreter: No such file or directory

原因是ld-linux-x86-64.so.2是操作系统的核心，并不受LD_LIBRARY_PATH环境变量的影响。如果想改变其调用方式需查看man文档。可能是这个文档太老了，在服务器上怎么man都没有，只有网上有：http://www.man7.org/linux/man-pages/man8/ld.so.8.html
 
解决如下：

使用linux救援模式进入系统。原系统被挂载到 /mnt/sysimage/目录下，拷贝需要文件到挂载的对应目录里面，然后重启系统恢复正常。
拷贝需要文件：
cp -rf /lib64/*   /mnt/sysimage/lib64/
reboot  或者  exit

MySQL5.7 报错 Lost connection to MySQL server during query

root@db-01:~# vim /etc/my.cnf
#该值设置过小将导致单个记录超过限制后写入数据库失败，且后续记录写入也将失败
#max_allowed_packet = 128M        # 原来的值
max_allowed_packet = 1024M        # 调整后的值
 
# 重启MySQL
root@db-01:~# /etc/init.d/mysql restart
Restarting mysql (via systemctl): mysql.service

ssh时报 Unable to negotiate with 172.xx.xx.62 port 22: no matching cipher found. Their offer: 3des-cbc

出现这样的错误并不是账号、密码、地址错误，纯粹时用了ssh的加密算法而已
解决：
先登录到该机器：ssh -c 3des-cbc@172.xx.xx.62
然后讲ssh的加密算法注释
vim /etc/ssh/sshd_config
#Ciphers 3des-cbc
#MACs hmac-sha1,hmac-md5
 
重启ssh让其生效
systemctl restart sshd

message中报 mariadb-5.5.52-1.el7.x86_64 has missing requires of mariadb-libs(x86-64)

CentOS7.6
 
解决：
wget  http://mirror.centos.org/centos/7/os/x86_64/Packages/mariadb-libs-5.5.68-1.el7.x86_64.rpm
yum -y install mariadb-libs-5.5.68-1.el7.x86_64.rpm
ldconfig -v|grep libmysqlclient.so

-bash: warning: setlocale: LC_CTYPE: cannot change locale (zh_CN.UTF-8)

[root@foundation0 ~]# ssh student@wor-bash: warning: setlocale: LC_CTYPE: cannot change locale (zh_CN.UTF-8)
-bash: warning: setlocale: LC_CTYPE: cannot change locale (zh_CN.UTF-8)
kstation
# 解决
~]# echo 'export LC_ALL=C' >> /etc/profile
# 测试登录
[root@foundation0 ~]# ssh student@workstation
Last login: Sun Sep  4 17:50:42 2022 from 172.25.250.250
[student@workstation ~]$

Host key verification failed.(在Mint21上执行的报错)

# 更新于2024年9月9日
rambo@p360:~/下载$ sudo scp igb-5.7.2.tar.gz rambo@172.16.186.144:~
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ED25519 key sent by the remote host is
SHA256:oKyemzoRwYeAhq14EP01sAbx2nAlnVQ4+9D32XV29f4.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:40
  remove with:
  ssh-keygen -f "/root/.ssh/known_hosts" -R "172.16.186.144"
Host key for 172.16.186.144 has changed and you have requested strict checking.
Host key verification failed.
lost connection
 
# 按提示执行
rambo@p360:~/下载$ sudo ssh-keygen -f "/root/.ssh/known_hosts" -R "172.16.186.144"
# Host 172.16.186.144 found: line 38
# Host 172.16.186.144 found: line 39
# Host 172.16.186.144 found: line 40
/root/.ssh/known_hosts updated.
Original contents retained as /root/.ssh/known_hosts.old
# 再来发送
rambo@p360:~/下载$ sudo scp igb-5.7.2.tar.gz rambo@172.16.186.144:~
The authenticity of host '172.16.186.144 (172.16.186.144)' can't be established.
ED25519 key fingerprint is SHA256:oKyemzoRwYeAhq14EP01sAbx2nAlnVQ4+9D32XV29f4.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '172.16.186.144' (ED25519) to the list of known hosts.
rambo@172.16.186.144's password: 
igb-5.7.2.tar.gz  
 
 

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