linux►distro►centos

centos 常见问题

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# Failed to set locale, defaulting to C

# vim /etc/profile
# 输入
export LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8
export LC_COLLATE=C
export LC_CTYPE=en_US.UTF-8

yum

yum 命令卡住

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# 问题出在 Amazon Linux 2，所有 yum 命令卡住
ps aux | grep yum

kill -9 <pid>  # kill 所有 yum 进程

其他问题

Failed to download metadata for repo ‘appstream’

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# 保存
CentOS Linux 8 - AppStream                                                                                          9.5  B/s |  38  B     00:03
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

# 解决
dnf --disablerepo '*' --enablerepo=extras swap centos-linux-repos centos-stream-repos -y
dnf distro-sync -y

Openstack 初始化后无法联网

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sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0

# 添加 DNS1
DNS1=192.168.6.1

# 重启网络服务
sudo systemctl restart NetworkManager

Centos 7 安装 gcc 7

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sudo yum install gcc72-c++

软件包

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# lcov
yum install lcov.noarch

CentOS 7

centos 7 的生命已经结束，再继续使用会遇到很多问题。

centos-release-scl-rh

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# 安装
yum install centos-release-scl-rh

更新源配置文件。

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# /etc/yum.repos.d/CentOS-SCLo-scl-rh.repo
[centos-sclo-rh]
name=CentOS-7.9.2009 - SCLo rh
baseurl=https://vault.centos.org/7.9.2009/sclo/$basearch/rh/
gpgcheck=0
enabled=1

[centos-sclo-sclo]
name=CentOS-7.9.2009 - SCLo sclo
baseurl=https://vault.centos.org/7.9.2009/sclo/$basearch/sclo/
gpgcheck=0
enabled=1