记录R语言和Rstudio的报错：
1. Error 28 (inotify_add_watch: No watches available)
File monitoring failed for project at "~xxx"
Error 28 (inotify_add_watch: No watches available)
Features disabled: R source file indexing, Diagnostics
不少人遇到了该问题：
- https://github.com/rstudio/rstudio/issues/3267
(1) 改配置文件
from: 百度ai
原始值：
$ cat /proc/sys/fs/inotify/max_user_watches
8192
新的值：
$ echo 10000 | sudo tee /proc/sys/fs/inotify/max_user_watches
修改失败：只读
# echo 10000 | sudo tee /proc/sys/fs/inotify/max_user_watches
tee: /proc/sys/fs/inotify/max_user_watches: Read-only file system
10000
(2) 修改配置文件2
- https://forum.posit.co/t/error-28-inotify-add-watch-no-watches-available/131059
# echo fs.inotify.max_user_watches=100000 | sudo tee -a /etc/sysctl.conf; sudo sysctl -p
fs.inotify.max_user_watches=100000
sysctl: setting key "fs.inotify.max_user_watches": Read-only file system
只读，查看，已经添加进去了
$ cat /etc/sysctl.conf | tail
fs.inotify.max_user_watches=100000