一、jenkins 使用rpm安装以及卸载

jenkins安装

环境：
centos7
阿里云yum镜像
rpm形式安装的jdk1.8

先安装wget

yum install -y wget

使用wget下载rpm包

wget https://mirrors.aliyun.com/jenkins/redhat/jenkins-2.266-1.1.noarch.rpm
或者
wget https://mirrors.tuna.tsinghua.edu.cn/jenkins/redhat/jenkins-2.267-1.1.noarch.rpm

rpm安装jenkins

rpm -ivh jenkins-2.267-1.1.noarch.rpm

安装完成后，查看安装目录（以下jenkins文件所在目录可供参考）

find / -name jenkins 

结果如下：

[root@bogon ~]# find / -name jenkins
/run/lock/subsys/jenkins
/etc/sysconfig/jenkins				#jenkins配置文件
/etc/rc.d/init.d/jenkins
/etc/logrotate.d/jenkins
/var/lib/jenkins							#jenkins安装目录
/var/log/jenkins						#jenkins日志
/var/cache/jenkins
/usr/lib/jenkins							#jenkins.war存放目录

[root@bogon ~]# find /usr/lib/jenkins
/usr/lib/jenkins
/usr/lib/jenkins/jenkins.war

启动jenkins

systemctl start jenkins

此时注意，执行下面的命令可以查看jenkins进程

ps -ef |grep java | grep -v grep

结果：

[root@bogon ~]# ps -ef | grep java | grep -v grep
root       1493      1  0 17:58 ?        00:00:14 /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -Djava.awt.headless=true -DJENKINS_HOME=/var/lib/jenkins -jar /usr/lib/jenkins/jenkins.war --logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --daemon --httpPort=8888 --debug=5 --handlerCountMax=100 --handlerCountMaxIdle=20

可以看出jenkins的启动实际上是以java -jar的形式启动的，这也是要说的下一种最简单的java命令启动jenkins.war包;

上面的java进程可以看出 此时的启动端口并不是默认的8080而是--httpPort=8888 此处修改的配置文件，修改内容如下：

执行命令：

vi /etc/sysconfig/jenkins

文件所有内容如下：

## Path:        Development/Jenkins
## Description: Jenkins Automation Server
## Type:        string
## Default:     "/var/lib/jenkins"
## ServiceRestart: jenkins
#
# Directory where Jenkins store its configuration and working
# files (checkouts, build reports, artifacts, ...).
#
JENKINS_HOME="/var/lib/jenkins"

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# Java executable to run Jenkins
# When left empty, we'll try to find the suitable Java.
#
JENKINS_JAVA_CMD=""

## Type:        string
## Default:     "jenkins"
## ServiceRestart: jenkins
#
# Unix user account that runs the Jenkins daemon
# Be careful when you change this, as you need to update
# permissions of $JENKINS_HOME and /var/log/jenkins.
#
JENKINS_USER="root"

## Type:        string
## Default: "false"
## ServiceRestart: jenkins
#
# Whether to skip potentially long-running chown at the
# $JENKINS_HOME location. Do not enable this, "true", unless
# you know what you're doing. See JENKINS-23273.
#
#JENKINS_INSTALL_SKIP_CHOWN="false"

## Type: string
## Default:     "-Djava.awt.headless=true"
## ServiceRestart: jenkins
#
# Options to pass to java when running Jenkins.
#
JENKINS_JAVA_OPTIONS="-Djava.awt.headless=true"

## Type:        integer(0:65535)
## Default:     8080
## ServiceRestart: jenkins
#
# Port Jenkins is listening on.
# Set to -1 to disable
#
JENKINS_PORT="8888"

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# IP address Jenkins listens on for HTTP requests.
# Default is all interfaces (0.0.0.0).
#
JENKINS_LISTEN_ADDRESS=""

## Type:        integer(0:65535)
## Default:     ""
## ServiceRestart: jenkins
#
# HTTPS port Jenkins is listening on.
# Default is disabled.
#
JENKINS_HTTPS_PORT=""

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# Path to the keystore in JKS format (as created by the JDK 'keytool').
# Default is disabled.
#
JENKINS_HTTPS_KEYSTORE=""

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# Password to access the keystore defined in JENKINS_HTTPS_KEYSTORE.
# Default is disabled.
#
JENKINS_HTTPS_KEYSTORE_PASSWORD=""

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# IP address Jenkins listens on for HTTPS requests.
# Default is disabled.
#
JENKINS_HTTPS_LISTEN_ADDRESS=""

## Type:        integer(0:65535)
## Default:     ""
## ServiceRestart: jenkins
#
# HTTP2 port Jenkins is listening on.
# Default is disabled.
#
# Notice: HTTP2 support may require additional configuration, see Winstone
# documentation for more information.
#
JENKINS_HTTP2_PORT=""

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# IP address Jenkins listens on for HTTP2 requests.
# Default is disabled.
#
# Notice: HTTP2 support may require additional configuration, see Winstone
# documentation for more information.
#
JENKINS_HTTP2_LISTEN_ADDRESS=""

## Type:        integer(1:9)
## Default:     5
## ServiceRestart: jenkins
#
# Debug level for logs -- the higher the value, the more verbose.
# 5 is INFO.
#
JENKINS_DEBUG_LEVEL="5"

## Type:        yesno
## Default:     no
## ServiceRestart: jenkins
#
# Whether to enable access logging or not.
#
JENKINS_ENABLE_ACCESS_LOG="no"

## Type:        integer
## Default:     100
## ServiceRestart: jenkins
#
# Maximum number of HTTP worker threads.
#
JENKINS_HANDLER_MAX="100"

## Type:        integer
## Default:     20
## ServiceRestart: jenkins
#
# Maximum number of idle HTTP worker threads.
#
JENKINS_HANDLER_IDLE="20"

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# Folder for additional jar files to add to the Jetty class loader.
# See Winstone documentation for more information.
# Default is disabled.
#
JENKINS_EXTRA_LIB_FOLDER=""

## Type:        string
## Default:     ""
## ServiceRestart: jenkins
#
# Pass arbitrary arguments to Jenkins.
# Full option list: java -jar jenkins.war --help
#
JENKINS_ARGS=""

二、jenkins使用java 命令启动

使用java命令运行jenkins实际上并没有在jenkins.war下找到相关的配置文件；
基本启动命令(jenkins的war包可以去官网下载)：

java -jar jenkins.war

这样启动后默认的端口就是8080
要修改端口或者其他参数可以使用以下命令，查看参数列表：

java -jar jenkins.war --help

所有参数列表如下

[root@bogon ~]# java -jar jenkins.war --help
Running from: /root/jenkins.war
webroot: $user.home/.jenkins
Jenkins Automation Server Engine 2.266
Usage: java -jar jenkins.war [--option=value] [--option=value]

Options:
   --webroot                = folder where the WAR file is expanded into. Default is ${JENKINS_HOME}/war
   --pluginroot             = folder where the plugin archives are expanded into. Default is ${JENKINS_HOME}/plugins
                              (NOTE: this option does not change the directory where the plugin archives are stored)
   --extractedFilesFolder   = folder where extracted files are to be located. Default is the temp folder
   --daemon                 = fork into background and run as daemon (Unix only)
   --logfile                = redirect log messages to this file
   --enable-future-java     = allows running with new Java versions which are not fully supported (class version 52 and above)
   --javaHome               = Override the JAVA_HOME variable
   --toolsJar               = The location of tools.jar. Default is JAVA_HOME/lib/tools.jar
   --config                 = load configuration properties from here. Default is ./winstone.properties
   --prefix                 = add this prefix to all URLs (eg http://localhost:8080/prefix/resource). Default is none
   --commonLibFolder        = folder for additional jar files. Default is ./lib

   --extraLibFolder         = folder for additional jar files to add to Jetty classloader

   --logThrowingLineNo      = show the line no that logged the message (slow). Default is false
   --logThrowingThread      = show the thread that logged the message. Default is false
   --debug                  = set the level of debug msgs (1-9). Default is 5 (INFO level)

   --httpPort               = set the http listening port. -1 to disable, Default is 8080
   --httpListenAddress      = set the http listening address. Default is all interfaces
   --httpKeepAliveTimeout   = how long idle HTTP keep-alive connections are kept around (in ms; default 5000)?
   --httpsPort              = set the https listening port. -1 to disable, Default is disabled
   --httpsListenAddress     = set the https listening address. Default is all interfaces
   --httpsKeepAliveTimeout  = how long idle HTTPS keep-alive connections are kept around (in ms; default 5000)?
   --httpsKeyStore          = the location of the SSL KeyStore file. Default is ./winstone.ks
   --httpsKeyStorePassword  = the password for the SSL KeyStore file. Default is null
   --httpsKeyManagerType    = the SSL KeyManagerFactory type (eg SunX509, IbmX509). Default is SunX509
   --httpsPrivateKey        = this switch with --httpsCertificate can be used to run HTTPS with OpenSSL secret key
     / --httpsCertificate     file and the corresponding certificate file
   --httpsRedirectHttp      = redirect http requests to https (requires both --httpPort and --httpsPort)
   --http2Port              = set the http2 listening port. -1 to disable, Default is disabled
   --http2ListenAddress     = set the http2 listening address. Default is all interfaces
   --excludeCipherSuites    = set the ciphers to exclude (comma separated, use blank quote " " to exclude none) (default is
                           // Exclude weak / insecure ciphers 
                           "^.*_(MD5|SHA|SHA1)$", 
                           // Exclude ciphers that don't support forward secrecy 
                           "^TLS_RSA_.*$", 
                           // The following exclusions are present to cleanup known bad cipher 
                           // suites that may be accidentally included via include patterns. 
                           // The default enabled cipher list in Java will not include these 
                           // (but they are available in the supported list). 
                           "^SSL_.*$", 
                           "^.*_NULL_.*$", 
                           "^.*_anon_.*$" 
   --controlPort            = set the shutdown/control port. -1 to disable, Default disabled

   --useJasper              = enable jasper JSP handling (true/false). Default is false
   --sessionTimeout         = set the http session timeout value in minutes. Default to what webapp specifies, and then to 60 minutes
   --sessionEviction        = set the session eviction timeout for idle sessions in seconds. Default value is 180. -1 never evict, 0 evict on exit
   --mimeTypes=ARG          = define additional MIME type mappings. ARG would be EXT=MIMETYPE:EXT=MIMETYPE:...
                              (e.g., xls=application/vnd.ms-excel:wmf=application/x-msmetafile)
   --requestHeaderSize=N    = set the maximum size in bytes of the request header. Default is 8192.
   --maxParamCount=N        = set the max number of parameters allowed in a form submission to protect
                              against hash DoS attack (oCERT #2011-003). Default is 10000.
   --useJmx                 = Enable Jetty Jmx
   --qtpMaxThreadsCount     = max threads number when using Jetty Queued Thread Pool
   --jettyAcceptorsCount    = Jetty Acceptors number
   --jettySelectorsCount    = Jetty Selectors number
   --usage / --help         = show this message
 Security options:
   --realmClassName               = Set the realm class to use for user authentication. Defaults to ArgumentsRealm class

   --argumentsRealm.passwd.<user> = Password for user <user>. Only valid for the ArgumentsRealm realm class
   --argumentsRealm.roles.<user>  = Roles for user <user> (comma separated). Only valid for the ArgumentsRealm realm class

   --fileRealm.configFile         = File containing users/passwds/roles. Only valid for the FileRealm realm class

 Access logging:
   --accessLoggerClassName        = Set the access logger class to use for user authentication. Defaults to disabled
   --simpleAccessLogger.format    = The log format to use. Supports combined/common/resin/custom (SimpleAccessLogger only)
   --simpleAccessLogger.file      = The location pattern for the log file(SimpleAccessLogger only)

以上！