在Ubuntu下安装Nginx有以下方法，但是如果想要安装最新版本的就必须下载源码包编译安装。
一、基于APT源安装
sudo apt-get install nginx
安装好的文件位置：
/usr/sbin/nginx：主程序
/etc/nginx：存放配置文件
/usr/share/nginx：存放静态文件
/var/log/nginx：存放日志
其实从上面的根目录文件夹可以知道，Linux系统的配置文件一般放在/etc，日志一般放在/var/log，运行的程序一般放在/usr/sbin或者/usr/bin。
当然，如果要更清楚Nginx的配置项放在什么地方，可以打开/etc/nginx/nginx.conf
我猜测，Nginx如果指定默认加载/etc/nginx/nginx.conf的配置文件。如果要查看加载的是哪个配置文件，可以用这个命令sudo nginx -t或者ps -ef | grep nginx
然后通过这种方式安装的，会自动创建服务，会自动在/etc/init.d/nginx新建服务脚本，然后就可以使用sudo service nginx {start|stop|restart|reload|force-reload|status|configtest|rotate|upgrade}的命令启动。
脚本如下：
#!/bin/sh### BEGIN INIT INFO # Provides: nginx # Required-Start: $local_fs $remote_fs $network $syslog $named # Required-Stop: $local_fs $remote_fs $network $syslog $named # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: starts the nginx web server # Description: starts nginx using start-stop-daemon ### END INIT INFOPATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin DAEMON=/usr/sbin/nginx NAME=nginx DESC=nginx# Include nginx defaults if available if [ -r /etc/default/nginx ]; then. /etc/default/nginx fiSTOP_SCHEDULE="${STOP_SCHEDULE:-QUIT/5/TERM/5/KILL/5}"test -x $DAEMON || exit 0. /lib/init/vars.sh . /lib/lsb/init-functions# Try to extract nginx pidfile PID=$(cat /etc/nginx/nginx.conf | grep -Ev '^\s*#' | awk 'BEGIN { RS="[;{}]" } { if ($1 == "pid") print $2 }' | head -n1) if [ -z "$PID" ]; thenPID=/run/nginx.pid fiif [ -n "$ULIMIT" ]; then# Set ulimit if it is set in /etc/default/nginxulimit $ULIMIT fistart_nginx() {# Start the daemon/service## Returns:# 0 if daemon has been started# 1 if daemon was already running# 2 if daemon could not be startedstart-stop-daemon --start --quiet --pidfile $PID --exec $DAEMON --test > /dev/null \|| return 1start-stop-daemon --start --quiet --pidfile $PID --exec $DAEMON -- \$DAEMON_OPTS 2>/dev/null \|| return 2 }test_config() {# Test the nginx configuration$DAEMON -t $DAEMON_OPTS >/dev/null 2>&1 }stop_nginx() {# Stops the daemon/service## Return# 0 if daemon has been stopped# 1 if daemon was already stopped# 2 if daemon could not be stopped# other if a failure occurredstart-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PID --name $NAMERETVAL="$?"sleep 1return "$RETVAL" }reload_nginx() {# Function that sends a SIGHUP to the daemon/servicestart-stop-daemon --stop --signal HUP --quiet --pidfile $PID --name $NAMEreturn 0 }rotate_logs() {# Rotate log filesstart-stop-daemon --stop --signal USR1 --quiet --pidfile $PID --name $NAMEreturn 0 }upgrade_nginx() {# Online upgrade nginx executable# http://nginx.org/en/docs/control.html ## Return# 0 if nginx has been successfully upgraded# 1 if nginx is not running# 2 if the pid files were not created on time# 3 if the old master could not be killedif start-stop-daemon --stop --signal USR2 --quiet --pidfile $PID --name $NAME; then# Wait for both old and new master to write their pid filewhile [ ! -s "${PID}.oldbin" ] || [ ! -s "${PID}" ]; docnt=`expr $cnt + 1`if [ $cnt -gt 10 ]; thenreturn 2fisleep 1done# Everything is ready, gracefully stop the old masterif start-stop-daemon --stop --signal QUIT --quiet --pidfile "${PID}.oldbin" --name $NAME; thenreturn 0elsereturn 3fielsereturn 1fi }case "$1" instart)log_daemon_msg "Starting $DESC" "$NAME"start_nginxcase "$?" in0|1) log_end_msg 0 ;;2) log_end_msg 1 ;;esac;;stop)log_daemon_msg "Stopping $DESC" "$NAME"stop_nginxcase "$?" in0|1) log_end_msg 0 ;;2) log_end_msg 1 ;;esac;;restart)log_daemon_msg "Restarting $DESC" "$NAME"# Check configuration before stopping nginxif ! test_config; thenlog_end_msg 1 # Configuration errorexit $?fistop_nginxcase "$?" in0|1)start_nginxcase "$?" in0) log_end_msg 0 ;;1) log_end_msg 1 ;; # Old process is still running*) log_end_msg 1 ;; # Failed to startesac;;*)# Failed to stoplog_end_msg 1;;esac;;reload|force-reload)log_daemon_msg "Reloading $DESC configuration" "$NAME"# Check configuration before stopping nginx## This is not entirely correct since the on-disk nginx binary# may differ from the in-memory one, but that's not common. # We prefer to check the configuration and return an error# to the administrator.if ! test_config; thenlog_end_msg 1 # Configuration errorexit $?fireload_nginxlog_end_msg $?;;configtest|testconfig)log_daemon_msg "Testing $DESC configuration"test_configlog_end_msg $?;;status)status_of_proc -p $PID "$DAEMON" "$NAME" && exit 0 || exit $?;;upgrade)log_daemon_msg "Upgrading binary" "$NAME"upgrade_nginxlog_end_msg $?;;rotate)log_daemon_msg "Re-opening $DESC log files" "$NAME"rotate_logslog_end_msg $?;;*)echo "Usage: $NAME {start|stop|restart|reload|force-reload|status|configtest|rotate|upgrade}" >&2exit 3;; esac
还有一个好处，创建好的文件由于放在/usr/sbin目录下，所以能直接在终端中使用nginx命令而无需指定路径。
二、通过源码包编译安装
这种方式可以自定安装指定的模块以及最新的版本。方式更灵活。
官方下载页面：http://nginx.org/en/download.html
configure配置文件详解：http://nginx.org/en/docs/configure.html
安装gcc g++的依赖库
Nginx是C语言开发，安装nginx需要先将官网下载的源码进行编译，编译依赖gcc环境，如果没有gcc环境
sudo apt-get install build-essential sudo apt-get install libtool
centos的话：yum install gcc-c++
安装pcre依赖库（http://www.pcre.org/）
是一个Perl库，包括 perl 兼容的正则表达式库。nginx的http模块使用pcre来解析正则表达式，所以需要在linux上安装pcre库
sudo apt-get update sudo apt-get install libpcre3 libpcre3-dev
centos的话：yum install -y pcre pcre-devel
安装zlib依赖库（http://www.zlib.net）
zlib库提供了很多种压缩和解压缩的方式，nginx使用zlib对http包的内容进行gzip，所以需要在linux上安装zlib库
sudo apt-get install zlib1g-dev
centos的话：yum install -y zlib zlib-devel
安装SSL依赖库（16.04默认已经安装了）
OpenSSL 是一个强大的安全套接字层密码库，囊括主要的密码算法、常用的密钥和证书封装管理功能及SSL协议，并提供丰富的应用程序供测试或其它目的使用。
nginx不仅支持http协议，还支持https（即在ssl协议上传输http），所以需要在linux安装openssl库。
sudo apt-get install openssl
centos的话：yum install -y openssl openssl-devel
安装Nginx
#下载最新版本： wget http://nginx.org/download/nginx-1.13.6.tar.gz #解压： tar -zxvf nginx-1.13.6.tar.gz #进入解压目录： cd nginx-1.13.6 #配置： ./configure --prefix=/usr/local/nginx #编译： make #安装： sudo make install #启动： sudo /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf 注意：-c 指定配置文件的路径，不加的话，nginx会自动加载默认路径的配置文件，可以通过-h查看帮助命令。 #查看进程： ps -ef | grep nginx
关于configure、make、make install
源码的安装一般由有这三个步骤：配置(configure)、编译(make)、安装(make install)其中–prefix选项就是配置安装的路径，如果不配置该选项，安装后可执行文件默认放在/usr /local/bin，库文件默认放在/usr/local/lib，配置文件默认放在/usr/local/etc，其它的资源文件放在/usr /local/share，比较分散。为了便于集中管理某个软件的各种文件，可以配置–prefix，如： ./configure –prefix=/usr/local 可以把所有资源文件放在/usr/local的路径中，就不会分散了。
配置软链接
sudo ln -s /usr/local/nginx/sbin/nginx /usr/bin/nginx
现在就可以不用路径直接输入nginx启动。
配置开机启动服务
在/etc/init.d/下创建nginx文件，sudo vim /etc/init.d/nginx，内容如下：
#!/bin/sh### BEGIN INIT INFO # Provides: nginx # Required-Start: $local_fs $remote_fs $network $syslog $named # Required-Stop: $local_fs $remote_fs $network $syslog $named # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: starts the nginx web server # Description: starts nginx using start-stop-daemon ### END INIT INFOPATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin DAEMON=/usr/local/nginx/sbin/nginx NAME=nginx DESC=nginx# Include nginx defaults if available if [ -r /etc/default/nginx ]; then. /etc/default/nginx fiSTOP_SCHEDULE="${STOP_SCHEDULE:-QUIT/5/TERM/5/KILL/5}"test -x $DAEMON || exit 0. /lib/init/vars.sh . /lib/lsb/init-functions# Try to extract nginx pidfile PID=$(cat /usr/local/nginx/conf/nginx.conf | grep -Ev '^\s*#' | awk 'BEGIN { RS="[;{}]" } { if ($1 == "pid") print $2 }' | head -n1) if [ -z "$PID" ]; thenPID=/run/nginx.pid fiif [ -n "$ULIMIT" ]; then# Set ulimit if it is set in /etc/default/nginxulimit $ULIMIT fistart_nginx() {# Start the daemon/service## Returns:# 0 if daemon has been started# 1 if daemon was already running# 2 if daemon could not be startedstart-stop-daemon --start --quiet --pidfile $PID --exec $DAEMON --test > /dev/null \|| return 1start-stop-daemon --start --quiet --pidfile $PID --exec $DAEMON -- \$DAEMON_OPTS 2>/dev/null \|| return 2 }test_config() {# Test the nginx configuration$DAEMON -t $DAEMON_OPTS >/dev/null 2>&1 }stop_nginx() {# Stops the daemon/service## Return# 0 if daemon has been stopped# 1 if daemon was already stopped# 2 if daemon could not be stopped# other if a failure occurredstart-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PID --name $NAMERETVAL="$?"sleep 1return "$RETVAL" }reload_nginx() {# Function that sends a SIGHUP to the daemon/servicestart-stop-daemon --stop --signal HUP --quiet --pidfile $PID --name $NAMEreturn 0 }rotate_logs() {# Rotate log filesstart-stop-daemon --stop --signal USR1 --quiet --pidfile $PID --name $NAMEreturn 0 }upgrade_nginx() {# Online upgrade nginx executable# http://nginx.org/en/docs/control.html ## Return# 0 if nginx has been successfully upgraded# 1 if nginx is not running# 2 if the pid files were not created on time# 3 if the old master could not be killedif start-stop-daemon --stop --signal USR2 --quiet --pidfile $PID --name $NAME; then# Wait for both old and new master to write their pid filewhile [ ! -s "${PID}.oldbin" ] || [ ! -s "${PID}" ]; docnt=`expr $cnt + 1`if [ $cnt -gt 10 ]; thenreturn 2fisleep 1done# Everything is ready, gracefully stop the old masterif start-stop-daemon --stop --signal QUIT --quiet --pidfile "${PID}.oldbin" --name $NAME; thenreturn 0elsereturn 3fielsereturn 1fi }case "$1" instart)log_daemon_msg "Starting $DESC" "$NAME"start_nginxcase "$?" in0|1) log_end_msg 0 ;;2) log_end_msg 1 ;;esac;;stop)log_daemon_msg "Stopping $DESC" "$NAME"stop_nginxcase "$?" in0|1) log_end_msg 0 ;;2) log_end_msg 1 ;;esac;;restart)log_daemon_msg "Restarting $DESC" "$NAME"# Check configuration before stopping nginxif ! test_config; thenlog_end_msg 1 # Configuration errorexit $?fistop_nginxcase "$?" in0|1)start_nginxcase "$?" in0) log_end_msg 0 ;;1) log_end_msg 1 ;; # Old process is still running*) log_end_msg 1 ;; # Failed to startesac;;*)# Failed to stoplog_end_msg 1;;esac;;reload|force-reload)log_daemon_msg "Reloading $DESC configuration" "$NAME"# Check configuration before stopping nginx## This is not entirely correct since the on-disk nginx binary# may differ from the in-memory one, but that's not common. # We prefer to check the configuration and return an error# to the administrator.if ! test_config; thenlog_end_msg 1 # Configuration errorexit $?fireload_nginxlog_end_msg $?;;configtest|testconfig)log_daemon_msg "Testing $DESC configuration"test_configlog_end_msg $?;;status)status_of_proc -p $PID "$DAEMON" "$NAME" && exit 0 || exit $?;;upgrade)log_daemon_msg "Upgrading binary" "$NAME"upgrade_nginxlog_end_msg $?;;rotate)log_daemon_msg "Re-opening $DESC log files" "$NAME"rotate_logslog_end_msg $?;;*)echo "Usage: $NAME {start|stop|restart|reload|force-reload|status|configtest|rotate|upgrade}" >&2exit 3;; esac
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#设置服务脚本有执行权限 sudo chmod +x /etc/init.d/nginx #注册服务
cd /etc/init.d/ sudo update-rc.d nginx defaults
现在基本上就可以开机启动了，常用的命令如下：
sudo service nginx {start|stop|restart|reload|force-reload|status|configtest|rotate|upgrade}
