Linux可以根据条件判断在Linux中的某一行插入内容吗?
例如,我想将用户"test“添加到/etc/sudoers,让它可以切换到root:
1 #
2 # This file MUST be edited with the 'visudo' command as root.
3 #
4 # Please consider adding local content in /etc/sudoers.d/ instead of
5 # directly modifying this file.
6 #
7 # See the man pag
在用角cli创建库时,我会得到以下错误
Schematic "library" not found in collection "@schematics/angular".
Error: Schematic "library" not found in collection
"@schematics/angular".
at SchematicEngine.createSchematic (/home/rafaelvicio/node-v8.9.3-linux-x64/lib/node_modules/@angular/c
我试图用f2py包装一些Fortran代码,并得到以下错误:
Reading fortran codes...
Reading file 'first_fn_prog.f90' (format:fix)
Line #8 in first_fn_prog.f90:" parameter (a = -1.d+0/2.72d+0) "
determineexprtype: could not determine expressions ('-1.d+0/2.72d+0') type.
analyzeline:
我用的是Ubuntu 14.04 LTS。当我试图更新我的系统时,我会收到以下错误消息:
软件更新程序-并不是所有的更新都可以安装
我在googled上搜索并建议使用sudo apt-get install -f修复损坏的包。但这对我没有用。
当我使用apt-get upgrade时,我收到以下消息:
Reading package lists...
Building dependency tree...
Reading state information...
The following packages have been kept back:
gir1.2-rb-3.0 gir1.2
有人能帮我吗谢谢。
root@awan:~# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be REMOVED:
linux-image-4.15.0-53-generic
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
2
当我打字时
aptitude dist-upgrade
举个例子:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
The following NEW packages will be installed:
bc{a} linux-image-2.6.32-24-virtual linux-ima
嘿,伙计们,帮帮我。我从4天的梦想主机建立rails。最后,rails已经开始工作,但应用程序没有运行。我刚刚部署了一个演示应用程序,只有一个模型产品,页面不打开,它说页面不存在。生产日志文件中存在写入路由错误。我是铁路新手,所以不知道出了什么问题。您可以尝试运行 ,并在我的 **上查看该应用程序的源代码和日志文件,我将非常感谢它的解决方案。
Started GET "/products" for 208.113.229.116 at 2012-07-26 16:05:55 -0700
ActionController::RoutingError (No route matc
此测试失败:
describe 'a confirm modal', :js, driver: :chrome do
it do
visit '/test/confirm'
dismiss_confirm do
click_link 'Cancel'
end
end
end
带有Selenium::WebDriver::Error::UnhandledAlertError: unexpected alert open错误。
一旦到达click_link 'Cancel'行,就会立即发生此