由于国外超便宜的VPS总是自己重启，搞得我frps总要断，弄了一下crontab+小脚本自动检测

小脚本

#!/bin/bash
if [ `ps -ef|grep frps | grep -v grep |wc -l`  -gt 0 ];then
echo running
else
nohup  ~/frp_0.21.0_linux_amd64/frps -c ~/frp_0.21.0_linux_amd64/frps.ini 2>&1 &
fi

crontab

# Edit this file to introduce tasks to be run by cron.
# 
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
# 
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').# 
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
# 
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
# 
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
# 
# For more information see the manual pages of crontab(5) and cron(8)
# 
# m h  dom mon dow   command
*/1 * * * * ~/checkfrp.sh