Ubuntu 错误提示及解决办法总结

1.Failed to run /usr/sbin/synaptic as user root.
The underlying authorization mechanism (sudo) does not allow you to run this program. Contact the system administrator.

原因：由于错误执行usermod -G dba javen，将javen从其他组中删除加入dba组

解决：usermod -G javen,admin javen

正确方法：usermod -aG dba javen

2.You are not allowed to access the system configuration

原因：由于错误执行usermod -G dba root 将root从其他组中删除加入dba组

解决：sudo usermod -aG admin,dialout,dip,fax,cdrom,floppy,tape,audio,plugdev,scanner,dba root

正确方法：usermod -aG dba root