跳至主要內容
flutter配置镜像站

在中国网络环境下使用 Flutter: https://docs.flutter.cn/community/china/

选择镜像站

清华大学 TUNA 协会

上海交通大学 *nix 用户组

报错处理

Flutter获取依赖报错Got TLS error trying to find package xxx

假设你使用的镜像站是清华开源镜像站

打开 Chrome 浏览器，访问镜像站：https://mirrors.tuna.tsinghua.edu.cn/dart-pub/

Paper-Dragon...大约 1 分钟
一键安装Conda

Anacond安装包太大了，不方便下载和安装，每次安装conda工具都很麻烦，于是我写了个脚本。 这个脚本实现了一键安装miniconda，跟conda功能一样，安装包体积减小了很多。

一键安装脚本

curl -sSL https://www.geekery.cn/sh/LinuxCTS/os/all/miniconda.sh | bash
Paper-Dragon...小于 1 分钟
Docker老版本runc报错无法启动

系统: CentOS 7 Docker版本: 1.13.1

问题概述

执行命令 docker start container-name 无法启动， 报错如下

Error response from daemon: OCI runtime create failed: container with id exists: 
aaabbbbccccddd
Error: failed to start containers: container-name
Paper-Dragon...小于 1 分钟
清理Rancher节点

rancher重新部署，清理不干净的话是个很头疼的事情，残留的Kubernetes组件可能导致资源冲突或部署失败，以下是官方标准清理流程：

#复制粘贴就可以，亲测无误（注意根据实际情况修改安装目录/var/lib/rancher）
systemctl  disable kubelet.service
systemctl  disable kube-scheduler.service
systemctl  disable kube-proxy.service
systemctl  disable kube-controller-manager.service
systemctl  disable kube-apiserver.service
systemctl  stop kubelet.service
systemctl  stop kube-scheduler.service
systemctl  stop kube-proxy.service
systemctl  stop kube-controller-manager.service
systemctl  stop kube-apiserver.service
docker ps -a |egrep rancher |awk '{print $1}' |xargs docker rm -f
docker ps -a |egrep k8s |awk '{print $1}' |xargs docker rm -f
docker volume ls |grep -v openvpn |grep -v DRIVER |awk '{print $2}' |xargs docker volume rm
rm -rf /var/lib/etcd/
rm -rf /var/lib/rancher/
umount $(df -HT | grep '/var/lib/kubelet/pods' | awk '{print $7}')
rm -rf /etc/kubernetes
rm -rf /var/lib/etcd
rm -rf /var/lib/rancher
rm -rf /opt/rke/
rm -rf /etc/ceph/
rm -rf /etc/cni/
rm -rf /opt/cni/
rm -rf /run/secrets/kubernetes.io
rm -rf /run/calico/
rm -rf /run/flannel/
rm -rf /var/lib/calico/
rm -rf /var/lib/cni/
rm -rf /var/lib/kubelet/
rm -rf /var/log/containers/
rm -rf /var/log/pods/

network_interface=`ls /sys/class/net` 
for net_inter in $network_interface;
do
  if ! echo $net_inter | grep -qiE 'lo|docker0|eth*|ens*';then
    ip link delete $net_inter
  fi
done

#因为k8s会进行一些临时配置：防火墙、网络缓存等，需要重启服务器
sudo reboot
Paper-Dragon...小于 1 分钟
Ubuntu 22 安装 Kubernetes 1.29 集群指南

本文记录在 Ubuntu 22.04 系统上安装最新 Kubernetes 1.29 集群的完整过程，所有步骤均遵循官方文档操作规范

容器运行时安装

自 Kubernetes 1.20 版本起已弃用 Docker 支持，1.24 及后续版本完全移除了 Docker 依赖。容器运行时改用 containerd（符合 OCI 规范的标准容器实现）。虽然 Docker 已被弃用，但 containerd 仍由 Docker 公司维护，可通过 Docker 官方渠道安装最新版本。注意：如需安装特定版本 Kubernetes，建议从 GitHub 下载对应版本的 containerd。

Paper-Dragon...大约 6 分钟
Ubuntu修复CNVD-2024-4920726

CNVD-2024-4920726简介

Paper-Dragon...小于 1 分钟
GRUB锁定密码

该方法用于设置一个无法修改的用户密码，即使已经拥有root权限并且已经修改了密码，重启设备密码会自动恢复。

修改如下文件

L79-L88

[root@ubuntu grub2]# cat grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
set pager=1

if [ -s $prefix/grubenv ]; then
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="${saved_entry}"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

terminal_output console
if [ x$feature_timeout_style = xy ] ; then
  set timeout_style=menu
  set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
  set timeout=5
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/00_tuned ###
set tuned_params=""
set tuned_initrd=""
### END /etc/grub.d/00_tuned ###

### BEGIN /etc/grub.d/01_users ###
if [ -f ${prefix}/user.cfg ]; then
  source ${prefix}/user.cfg
  if [ -n "${GRUB2_PASSWORD}" ]; then
    set superusers="root"
    export superusers
    password_pbkdf2 root ${GRUB2_PASSWORD}
  fi
fi
### END /etc/grub.d/01_users ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'CentOS Linux (5.4.119-19-0006) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-5.4.119-19-0006-advanced-a96bb1f6-5e36-4743-8e86-8d3810f5ba85' {
	load_video
	set gfxpayload=keep
	insmod gzio
	insmod part_msdos
	insmod ext2
	set root='hd0,msdos2'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'  cb7790e2-0c09-42e6-88eb-987694de829b
	else
	  search --no-floppy --fs-uuid --set=root cb7790e2-0c09-42e6-88eb-987694de829b
	fi
	linux16 /vmlinuz-5.4.119-19-0006 root=UUID=a96bb1f6-5e36-4743-8e86-8d3810f5ba85 ro mgag200.modeset=0 ixgbe.allow_unsupported_sfp=1 vga=0x317 intel_iommu=on iommu=pt pci=realloc nousbstorage crashkernel=auto rhgb quiet 
	initrd16 /initramfs-5.4.119-19-0006.img
}
menuentry 'CentOS Linux (3.10.0-1160.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-1160.el7.x86_64-advanced-a96bb1f6-5e36-4743-8e86-8d3810f5ba85' {
	load_video
	set gfxpayload=keep
	insmod gzio
	insmod part_msdos
	insmod ext2
	set root='hd0,msdos2'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'  cb7790e2-0c09-42e6-88eb-987694de829b
	else
	  search --no-floppy --fs-uuid --set=root cb7790e2-0c09-42e6-88eb-987694de829b
	fi
	linux16 /vmlinuz-3.10.0-1160.el7.x86_64 root=UUID=a96bb1f6-5e36-4743-8e86-8d3810f5ba85 ro mgag200.modeset=0 ixgbe.allow_unsupported_sfp=1 vga=0x317 intel_iommu=on iommu=pt pci=realloc nousbstorage crashkernel=auto rhgb quiet 
	initrd16 /initramfs-3.10.0-1160.el7.x86_64.img
}
menuentry 'CentOS Linux (0-rescue-5737ebefe3cb44a2865fe1136b8df871) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-5737ebefe3cb44a2865fe1136b8df871-advanced-a96bb1f6-5e36-4743-8e86-8d3810f5ba85' {
	load_video
	insmod gzio
	insmod part_msdos
	insmod ext2
	set root='hd0,msdos2'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'  cb7790e2-0c09-42e6-88eb-987694de829b
	else
	  search --no-floppy --fs-uuid --set=root cb7790e2-0c09-42e6-88eb-987694de829b
	fi
	linux16 /vmlinuz-0-rescue-5737ebefe3cb44a2865fe1136b8df871 root=UUID=a96bb1f6-5e36-4743-8e86-8d3810f5ba85 ro mgag200.modeset=0 ixgbe.allow_unsupported_sfp=1 vga=0x317 intel_iommu=on iommu=pt pci=realloc nousbstorage crashkernel=auto rhgb quiet 
	initrd16 /initramfs-0-rescue-5737ebefe3cb44a2865fe1136b8df871.img
}
if [ "x$default" = 'CentOS Linux (5.4.119-19-0006) 7 (Core)' ]; then default='Advanced options for CentOS Linux>CentOS Linux (5.4.119-19-0006) 7 (Core)'; fi;
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_ppc_terminfo ###
### END /etc/grub.d/20_ppc_terminfo ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
Paper-Dragon...大约 2 分钟
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