更新 MacOS 後，修正常用工具項目(緩慢增加中) | The fix after installing the new version of MacOS

MacOS 的更新是 Mac 的賣點之一，修正了系統的錯誤 + 提供新功能 +滿足公司資安要求

*** Issues and Fixes *** 

Issue 1: 登入 ssh 連線時出現 LC_TYPE 錯誤。

-bash: warning: setlocale: LC_CTYPE: cannot change locale (UTF-8): No such file or directory

manpath: can't set the locale; make sure $LC_* and $LANG are correct

修正方式:

- 修改 /etc/ssh/ssh_config

將 Host *下方的 SendEnv LANG LC_* 註釋取消

Issue 2: 

ssh 很快就自動斷線

修正方式: 

同樣是修正 ssh_config 檔案，將 Host * 這段下方加上

ServerAliveInterval 60      # To prevent a session from disconnecting after idle

AddKeysToAgent yes          # Must add on macOS 10.12.2 and above. Detail see here

UseKeychain yes             # Must add on macOS 10.12.2 and above. Detail see here

StrictHostKeyChecking no    # Do not show the fingerprint of the public key

IdentityFile ~/.ssh/id_rsa  # Private key file to forward

=== English Version ===

Updating MacOS provides the following upsides: 

- Bug Fix & Security Patches

- New Functions 

- Being compliant to the security requirement from the IT department. 

However, it may also introduce some issues after the update is deployed, the followings are the corresponding handle/fix for the issues. 

Issue 1. The LC_TYPE error while making a ssh connection to the remote server. 

ex:  -bash: warning: setlocale: LC_CTYPE: cannot change locale (UTF-8): No such file or directory

manpath: can't set the locale; make sure $LC_* and $LANG are correct

Ans: You can fix this by modify you /etc/ssh/ssh_config file, which is the system-wide ssh connection setting of your MAC. By doing this, you need to comment the line of the 'Host *' section . 

#   SendEnv LANG LC_*

After it, you can connect your server with no such warnings.