CentOS6.5 升级内核

centos初始内核为2.6 ，用命令uname -r

[root@bogon ~]# uname -r
2.6.32-358.el6.x86_64

• 在yum的ELRepo源中，有 m ain l ine（3.13.1）、 l ong- t erm（3.10.28）这2个内核版本，考虑到long-term更稳定，会长期更新，所以选择这个版本。

1. 导入public key :
   rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
2. 安装ELRepo到CentOS-6.5中:
   rpm -ivh http://www.elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm
3. 安装 kernel-lt（lt=long-term）:
   yum --enablerepo=elrepo-kernel install kernel-lt -y
   或者安装kernel-ml（ml=mainline）:
   yum --enablerepo=elrepo-kernel install kernel-ml -y
4. 因为之前我配置阿里的yum源，所以在安装kernel-lt时一直报错：Error: Cannot retrieve repository metadata (repomd.xml) for repository: epel. Please verify its path and try again，元数据地址发生改变，不能获取数据。所以将epel.repo中的enabled=1改为enabled=0
5. 编辑grub.conf文件，修改Grub引导顺序，确认刚安装好的内核在哪个位置，然后设置default值（从0开始），一般新安装的内核在第一个位置，所以设置default=0。
   vi /etc/grub.conf

#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (4.10.3-1.el6.elrepo.x86_64)
        root (hd0,0)
        kernel /vmlinuz-4.10.3-1.el6.elrepo.x86_64 ro root=UUID=6f659055-ea8a-4ac1-9421-e91eb44ea7e0 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
        initrd /initramfs-4.10.3-1.el6.elrepo.x86_64.img
title CentOS (2.6.32-358.el6.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-358.el6.x86_64 ro root=UUID=6f659055-ea8a-4ac1-9421-e91eb44ea7e0 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet

6. 重启
   init 6
7. 重新查看内核
   uname -r

[root@bogon ~]# uname -r
4.10.3-1.el6.elrepo.x86_64

8. 大功告成O(∩_∩)O~

CentOS6.5 安装Docker

1. 更新yum
   yum update
2. 生成docker.repo

tee /etc/yum.repos.d/docker.repo <<-'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF

tee 读取标准输入的数据，并将其内容输出成文件。

3. yum安装docker

yum install docker-engine

docker安装

4. 查看版本

[root@bogon yum.repos.d]# docker --version
Docker version 1.7.1, build 786b29d

5. 启动docker服务
   service docker start
6. 检查docker状态
   service docker status
7. 在线查找镜像:docker search [镜像名]
   docker search tomcat
   start代表受欢迎程度。OFFICIAL代表官方版本

[root@bogon yum.repos.d]# docker search tomcat
NAME                           DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
tomcat                         Apache Tomcat is an open source implementa...   1235      [OK]
dordoka/tomcat                 Ubuntu 14.04, Oracle JDK 8 and Tomcat 8 ba...   33                   [OK]
davidcaste/alpine-tomcat       Apache Tomcat 7/8 using Oracle Java 7/8 wi...   17                   [OK]
cloudesire/tomcat              Tomcat server, 6/7/8                            13                   [OK]
andreptb/tomcat                Debian Jessie based image with Apache Tomc...   6                    [OK]
openweb/oracle-tomcat          A fork off of Official tomcat image with O...   5                    [OK]
fbrx/tomcat                    Minimal Tomcat image based on Alpine Linux      4                    [OK]
kieker/tomcat                                                                  2                    [OK]
picoded/tomcat                 tomcat 8 with java 8, and MANAGER_USER / M...   1                    [OK]
abzcoding/tomcat-redis         a tomcat container with redis as session m...   1                    [OK]
cloudunit/tomcat-9             tomcat-9                                        1                    [OK]
camptocamp/tomcat-logback      Docker image for tomcat with logback integ...   1                    [OK]
bitnami/tomcat                 Bitnami Tomcat Docker Image                     1                    [OK]
antoineco/tomcat-mod_cluster   Apache Tomcat with JBoss mod_cluster            1                    [OK]
charlycoste/tomcat             Debian based Tomcat (don't use it, this is...   0                    [OK]
cheewai/tomcat                 Tomcat and Oracle JRE in docker                 0                    [OK]
phpmentors/tomcat-app          Tomcat application image using Maven            0                    [OK]
davidcaste/debian-tomcat       Yet another Debian Docker image for Tomcat...   0                    [OK]
inspectit/tomcat               Tomcat with inspectIT                           0                    [OK]
muicoder/tomcat                tomcat                                          0                    [OK]
dianplus/tomcat                Tomcat base image maintained by dianjia.io.     0                    [OK]
antoineco/tomcat               Extra OS variants for the official Tomcat ...   0                    [OK]
blueur/tomcat                  Tomcat with the possibility to set the use...   0                    [OK]
steigr/tomcat                  Apache Tomcat based on Alpine Linux with l...   0                    [OK]
oriaks/tomcat                  Tomcat                                          0                    [OK]

8. 拉取镜像：docker pull [镜像名称[:版本]]
   docker pull tomcat:7