[user@mgmt dir]$ R

Fatal error: cannot create 'R_TempDir'

[user@mgmt dir]$ ll -ad /tmp

drwxrwxrwt. 2 root root 135168 Jun 20 19:12 /tmp

[user@mgmt dir]$ df -lh /tmp

Filesystem      Size  Used Avail Use% Mounted on

/tmp            100G  100G     0 100% /tmp

ps: 解决方案：https://stackoverflow.com/questions/6307836/fatal-error-cannot-mkdir-r-tempdir

Find who is filling up the /tmp dir or /root dir and delete it

du -sh *