Linux tricks – make the commandline out funny by cowsay

Let’s make the output funny.

Install cowsay on Debian/Ubuntu GNU/Linux:
$ sudo apt-get install cowsay

Pipe text steam to cowsay
$ ls / | cowsay

Replace cow with the Linux mascot:
$ ls / | cowsay -t tux

Just for fun, haha.

How to setup and deploy ssh keys under linux?

Not a hard working, and there are already many articles talk about that, but many students still don’t know how to do that …

The simple syntax for generating ssh key pair:
$ ssh-keygen -t algorithm -b bits -C "comments"

For example:
$ ssh-keygen -t rsa -b 4096 -C "my first ssh key pair!"

The simple syntax for deploying ssh key:
$ ssh-copy-id [email protected]

For example:
$ ssh-copy-id [email protected]

If you also have problems with ssh keys, I will suggest you to read the articles below, they are confirmed by myself, I think those are correct and easy versions, and there is no need to write them in my blog again …

3 good articles should be enough …

Remotely shutdown/restart Windows via Linux on Debian/Ubuntu based Linux

Need samba-common package first, install via apt:

$ sudo apt-get install samba-common

Then use this command to shutdown the computer remotely(replace ip, username and password with your own):

$ net rpc shutdown --ipaddress ip --user username%password

Add -r if you want to restart, not shutdown:

$ net rpc shutdown -r --ipaddress ip --user username%password

After execution, here is the success message:

Shutdown of remote machine succeeded

If receive these messages below means something failed:

Could not connect to server
Connection failed: NT_STATUS_IO_TIMEOUT
Could not initialise pipe winreg. Error was NT_STATUS_OBJECT_NAME_NOT_FOUND

There are many functions provide by net [rpc], like:

net rpc audit Modify global audit settings
net rpc info Show basic info about a domain
net rpc join Join a domain
net rpc oldjoin Join a domain created in server manager
net rpc testjoin Test that a join is valid
net rpc user List/modify users
net rpc password Change a user password
net rpc group List/modify groups
net rpc share List/modify shares
net rpc file List open files
net rpc printer List/modify printers
net rpc changetrustpw Change trust account password
net rpc trustdom Modify domain trusts
net rpc abortshutdown Abort a remote shutdown
net rpc shutdown Shutdown a remote server
net rpc samdump Dump SAM data of remote NT PDC
net rpc vampire Sync a remote NT PDC’s data into local passdb
net rpc getsid Fetch the domain sid into local secrets.tdb
net rpc rights Manage privileges assigned to SID
net rpc service Start/stop/query remote services
net rpc registry Manage registry hives
net rpc shell Open interactive shell on remote server
net rpc trust Manage trusts
net rpc conf Configure a remote samba server

Check man rpc for more details!

Microsoft Visual Studio Code Preview and .NET core on Linux


.NET Core如微軟先前所說支援Linux了,甚至連FreeBSD的版本都有(開發中),而目前丟在GitHub上的版本可用的.NET Core API已經有全部的45%了,相信很快就能到八成以上,詳情可參考.NET blog:
.NET Announcements at Build 2015

另外一件大事是Microsoft Visual Studio CodeVisual Studio的 … 兄弟?或說是一個比較初期的opensource版本,據說是based on GitHubatom editor


MicrosoftVisualStudioCodePreviewWebsite我自己裝起來玩的畫面,期待可以變得跟我們認識的Visual Studio愈來愈像XD?