ssh stuck at expecting SSH2_MSG_KEX_ECDH_REPLY

Posted on 2025/07/26 by 枯藤昏鸦

前段时间遇到使用了 WireGuard 的 IP SSH 卡在了 SSH2_MSG_KEX_ECDH_REPLY，使用主机对外的IP又能正常登陆。
debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: [email protected] debug1: kex: host key algorithm: ssh-ed25519 debug1: kex: server->client cipher: [email protected] MAC: compression: none debug1: kex: client->server cipher: [email protected] MAC: compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY

一番研究之后发现是 MTU 值偏低导致，在不调整 MTU 的情况下，可以更改 KexAlgorithms 或者 MACs 试试。
ssh [email protected] -v -o KexAlgorithms=ecdh-sha2-nistp521 ssh [email protected] -v -o MACs=hmac-sha2-256

-EOF-

macOS 不借助第三方软查看图片是否含有 Alpha 通道

Posted on 2025/06/25 by 枯藤昏鸦

方法一：
Using Preview:
1. Open the image in Preview
2. Click Tools > Show Inspector (or press Cmd + I)
3. Click the “i” tab (Information)
4. Look under “More Info” – it will show color space and bits per component

方法二：
Using Terminal:


sips -g format -g pixelWidth -g pixelHeight -g hasAlpha path/to/image.jpg

sips -g format -g pixelWidth -g pixelHeight -g hasAlpha path/to/image.jpg

-EOF-

快速添加public ssh key到服务器

Posted on 2025/06/25 by 枯藤昏鸦

登陆服务器，然后执行


mkdir -m 700 ~/.ssh
curl https://github.com/{username}.keys >> ~/.ssh/authorized_keys

mkdir -m 700 ~/.ssh

curl https://github.com/{username}.keys >> ~/.ssh/authorized_keys

-EOF-

PSQL 常用命令

Posted on 2024/11/24 by 枯藤昏鸦

创建新的数据库


psql -U postgres -c "CREATE DATABASE $DB_NAME;"

psql -U postgres -c "CREATE DATABASE $DB_NAME;"

创建新的用户

 
psql -U postgres -c "CREATE USER $DB_USER WITH PASSWORD '$DB_PASSWORD';"

psql -U postgres -c "CREATE USER $DB_USER WITH PASSWORD '$DB_PASSWORD';"

将新数据库的所有权限授予新用户

 
psql -U postgres -c "GRANT ALL PRIVILEGES ON DATABASE $DB_NAME TO $DB_USER;"

psql -U postgres -c "GRANT ALL PRIVILEGES ON DATABASE $DB_NAME TO $DB_USER;"

删除数据库

 
psql -U postgres -c "DROP DATABASE IF EXISTS $DB_NAME;"

psql -U postgres -c "DROP DATABASE IF EXISTS $DB_NAME;"

删除用户

 
psql -U postgres -c "DROP USER IF EXISTS $DB_USER;"

psql -U postgres -c "DROP USER IF EXISTS $DB_USER;"

-EOF-

修复 WordPress 的文件读写权限错误

Posted on 2024/08/01 by 枯藤昏鸦

如果在 WordPress Site Health 页面遇到 “Some files are not writable by WordPress”, 可以通过如下的方式解决：
1. 检查 web server 所使用的 user 账号，比如 nginx:


cat /etc/nginx/nginx.conf
user www-data;
worker_processes auto;
pid /run/nginx.pid;
error_log /var/log/nginx/error.log;
include /etc/nginx/modules-enabled/*.conf;

cat /etc/nginx/nginx.conf

user www-data;

worker_processes auto;

pid /run/nginx.pid;

error_log /var/log/nginx/error.log;

include /etc/nginx/modules-enabled/*.conf;

如上 nginx 所使用的 user 为 www-data.
2. 将 WordPress 的文件 Owner 更改成 web server user, 比如：


chown -R www-data:www-data /the/folder/place/the/wordpress/

chown -R www-data:www-data /the/folder/place/the/wordpress/

重新刷新页面即可。
-EOF-

未完待续

To Be Continued

Category Archives: 就是不分类

ssh stuck at expecting SSH2_MSG_KEX_ECDH_REPLY

macOS 不借助第三方软查看图片是否含有 Alpha 通道

快速添加public ssh key到服务器

PSQL 常用命令

修复 WordPress 的文件读写权限错误