ubuntu 再起動でpidファイルディレクトリ消える対処

这次是关于mongodb的pid文件，但其他文件也可能会以同样的方式消失。
→ Ubuntu的tmpfs（临时文件系统）

再起動すると、mongodbのpidファイルが置いてある/var/run/mongodbのmongodbディレクトリが消える。その対処。

所以，我创建了一个mongodb目录，并尝试创建一个符号链接来实现这个目标，但是失败了。因此，我决定创建一个启动脚本。

#!/bin/sh
mkdir -p /var/run/mongodb
cd /var/run
sudo chown -R mongodb:mongodb mongodb/

给予执行权限。chmod u+x pid_dir.sh

将其设置为在系统重新启动时通过cron执行。

使用sudo命令编辑crontab文件。

# 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

@reboot /home/ubuntu/bin/pid_dir.sh

如果有其他更好的方法，请告诉我！