通常我们会使用ssh工具连接远程的云主机部署运行web应用，但是当我们断开ssh回话后，应用也随之断开，那么有什么方法能使得应用不受ssh断开的影响呢？当然有方法！
一种方法大家可以参考《Linux下使Shell 命令脱离终端在后台运行》。
今天我们主要来介绍怎么使用forever管理node应用。
安装
npm install -g forever
使用
- 启动应用
forever start app.js
- 停止应用
forever stop app.js
更多参数
$ forever --help
usage: forever [action] [options] SCRIPT [script-options]
Monitors the script specified in the current process or as a daemon
actions:
start Start SCRIPT as a daemon
stop Stop the daemon SCRIPT by Id|Uid|Pid|Index|Script
stopall Stop all running forever scripts
restart Restart the daemon SCRIPT
restartall Restart all running forever scripts
list List all running forever scripts
config Lists all forever user configuration
set <key> <val> Sets the specified forever config <key>
clear <key> Clears the specified forever config <key>
logs Lists log files for all forever processes
logs <script|index> Tails the logs for <script|index>
columns add <col> Adds the specified column to the output in `forever list`
columns rm <col> Removed the specified column from the output in `forever list`
columns set <cols> Set all columns for the output in `forever list`
cleanlogs [CAREFUL] Deletes all historical forever log files
options:
-m MAX Only run the specified script MAX times
-l LOGFILE Logs the forever output to LOGFILE
-o OUTFILE Logs stdout from child script to OUTFILE
-e ERRFILE Logs stderr from child script to ERRFILE
-p PATH Base path for all forever related files (pid files, etc.)
-c COMMAND COMMAND to execute (defaults to node)
-a, --append Append logs
-f, --fifo Stream logs to stdout
-n, --number Number of log lines to print
--pidFile The pid file
--uid Process uid, useful as a namespace for processes (must wrap in a string)
e.g. forever start --uid "production" app.js
forever stop production
--sourceDir The source directory for which SCRIPT is relative to
--workingDir The working directory in which SCRIPT will execute
--minUptime Minimum uptime (millis) for a script to not be considered "spinning"
--spinSleepTime Time to wait (millis) between launches of a spinning script.
--colors --no-colors will disable output coloring
--plain Disable command line colors
-d, --debug Forces forever to log debug output
-v, --verbose Turns on the verbose messages from Forever
-s, --silent Run the child script silencing stdout and stderr
-w, --watch Watch for file changes
--watchDirectory Top-level directory to watch from
--watchIgnore To ignore pattern when watch is enabled (multiple option is allowed)
-t, --killTree Kills the entire child process tree on `stop`
--killSignal Support exit signal customization (default is SIGKILL),
used for restarting script gracefully e.g. --killSignal=SIGTERM
-h, --help You're staring at it
[Long Running Process]
The forever process will continue to run outputting log messages to the console.
ex. forever -o out.log -e err.log my-script.js
[Daemon]
The forever process will run as a daemon which will make the target process start
in the background. This is extremely useful for remote starting simple node.js scripts
without using nohup. It is recommended to run start with -o -l, & -e.
ex. forever start -l forever.log -o out.log -e err.log my-daemon.js
forever stop my-daemon.js
