報錯資訊：
[root@localhost bin]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
active:failed (result: exit-code) since fri 2019-01-25 02:07:03 est; 4min 25s ago
docs: man:firewalld(1)
process: 2037 execstart=/usr/sbin/firewalld --nofork --nopid $firewalld_args (code=exited, status=127)
main pid: 2037 (code=exited, status=127)
jan 25 02:07:03 localhost.localdomain systemd[1]: starting firewalld - dynamic firewall daemon...
jan 25 02:07:03 localhost.localdomain systemd[1]: firewalld.service: main process exited, code=exited, status=127/n/a
jan 25 02:07:03 localhost.localdomain systemd[1]: failed to start firewalld - dynamic firewall daemon.
jan 25 02:07:03 localhost.localdomain systemd[1]: unit firewalld.service entered failed state.
jan 25 02:07:03 localhost.localdomain systemd[1]: firewalld.service failed.
gogle了一大堆，乙個老兄說python版本不對。我的python確實從2公升到3了
解決辦法
1 檢視firewalld在那個路徑下
which firewalld
2 編輯firewalld檔案
3 將這個宣告，改為你老版本python。
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