当我们想在刚安装的Linux系统启动某些服务或者想进入root用户时提示认证失败或者权限不够时,原因是刚安装Ubuntu后,root用户默认是未激活的,不允许登录,也不允许使用su命令到转到root用户.对于Ubuntu系统桌面用户来说是为了增强安全性,但是有时我们需要进入到root用户中去办某些事情时却办不了,所以设置一下还是必要的. 在终端设置如下: 输入:sudo passwd Password for **: 输入安装时那个用户的密码 Enter new UNIX password: 输
参考: fatal error: Python.h: No such file or directory Ubuntu下 fatal error: Python.h: No such file or directory 解决方法 根据使用的Python版本安装python-dev库. sudo apt-get install python-dev # for python2.x installs sudo apt-get install python3-dev # for python3.x i
在用 sudo apt-get update 时出现这样的报错: W: GPG error: http://archive.ubuntukylin.com:10006/ubuntukylin xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8D5A09DC9B929006 解决方案: sudo apt-key adv
After you download the VirtualBox install package and install it (just defualt setting). Then you should download the ubuntu.iso file from the website. There are many articles about how to do this. What I want to point out is the error when installin
明明已经加了头文件 #include <sys/syscall.h> #include <sched.h> #include <sys/resource.h> 编译还是报错 error: 'syscall' was not declared in this scope 参考https://blog.csdn.net/kl222/article/details/17025367 ubuntu中syscall定义是放在头文件unistd.h中的. 再添加头文件unistd.
Check event viewer log Click Start, click Run, type eventvwr, and then click OK. Click on Security under Windows Log Do the following steps to resolve this error by modifying the server’s registry to specify the host name. To specify the host names t
解决方法:https://github.com/laravel/passport/issues/221 In your oauth_clients table, do the values you have above exist exactly as you have them in your database? oauth_clients id - 3 secret - 3TfJGj4rrvOQvjZkI8dDqx78ouH99F2DuIMKHoKH redirect - http://co
GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY xxxxxxxxx 解决方法 1 2 gpg --keyserver pgpkeys.mit.edu --recv-key xxxxxxxxx gpg -a --export xxxxxxxx
这个问题产生的原因是由于ubtun系统默认是没有激活root用户的,需要我们手工进行操作,在命令行界面下,或者在终端中输入如下命令: sudo passwd Password:你当前的密码 Enter new UNIX password:这个是root的密码 Retype new UNIX password:重复root的密码 然后会提示成功的信息. 在说明一点,使用su和sudo是有区别的,使用su切换用户需要输入所切换到的用户的密码,而使用sudo则是当前用户的密码.