sshd: no hostkeys available — exiting

在开启SSHD服务时报错. ==sshd re-exec requires execution with an absolute path== 用绝对路径启动,也报错如下:

==Could not load host key: /etc/ssh/ssh_host_key Could not load host key: /etc/ssh/ssh_host_rsa_key Could not load host key: /etc/ssh/ssh_host_dsa_key Disabling protocol version 1. Could not load host key Disabling protocol version 2. Could not load host key sshd: no****hostkeysavailable — exiting== 解决过程:

ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
/usr/sbin/sshd

如果上述两个文件存在，仍然出现这个错误，那么试试 chmod 600 上述两个文件。之后应该可以解决。

linux-webstorm无法打字

在启动脚本中加下面的支持即可,前提是你已经安装了搜过输入法

# webstorem (根据自己的实际情况找到对的文件，大概路径是这样的)
# vim $HOME/.local/share/JetBrains/Toolbox/apps/WebStorm/ch-0/212.5457.55/bin/webstorm.sh

# start ======>
export GTK_IM_MODULE=fcitx
export QT_IM_MODULE=fcitx
export XMODIFIERS=@im=fcitx
# <=======end

CentOS Linux 8 - AppStream Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

Step 1: Go to the /etc/yum.repos.d/ directory.

cd /etc/yum.repos.d/

Step 2: Run the below commands

sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*

sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

Step 3: Now run the yum update

yum update -y

That’s it!

Failed to download metadata for repo ‘AppStream’ [CentOS]

cd /etc/yum.repos.d/

sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*

sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

yum update -y