记录几个linux下的几个命令行

偶然看到某篇文章时,记录下了几个我现在不熟悉的,但很可能会用到的而且也比较帅气的命令行吧.
那篇文章在:http://blog.urfix.com/25-linux-commands/

mount | column -t                     #我应该会常用的
currently mounted filesystems in nice layout
Particularly useful if you’re mounting different drives, using the following command will allow you to see all the filesystems currently mounted on your computer and their respective specs with the added benefit of nice formatting.

 

<space>command
Execute a command without saving it in the history
Prepending one or more spaces to your command won’t be saved in history.
Useful for pr0n or passwords on the commandline.

 

mount -t tmpfs tmpfs /mnt -o size=1024m
Mount a temporary ram partition
Makes a partition in ram which is useful if you need a temporary working space as read/write access is fast.
Be aware that anything saved in this partition will be gone after your computer is turned off.

 

ssh-copy-id user@host    #我应该会常用的
Copy ssh keys to user@host to enable password-less ssh logins.
To generate the keys use the command ssh-keygen

 

ctrl-x e
Rapidly invoke an editor to write a long, complex, or tricky command
Next time you are using your shell, try typing ctrl-x e (that is holding control key press x and then e). The shell will take what you’ve written on the command line thus far and paste it into the editor specified by $EDITOR. Then you can edit at leisure using all the powerful macros and commands of vim, emacs, nano, or whatever.

 

mtr google.com
mtr, better than traceroute and ping combined
mtr combines the functionality of the traceroute and ping programs in a single network diagnostic tool.
As mtr starts, it investigates the network connection between the host mtr runs on and HOSTNAME. by sending packets with purposly low TTLs. It continues to send packets with low TTL, noting the response time of the intervening routers. This allows mtr to print the response percentage and response times of the internet route to HOSTNAME. A sudden increase in packetloss or response time is often an indication of a bad (or simply over‐loaded) link.

 

cp filename{,.bak}            #我应该会常用的
quickly backup or copy a file with bash

 

:w !sudo tee %            #我应该会常用的
Save a file you edited in vim without the needed permissions
I often forget to sudo before editing a file I don’t have write permissions on. When you come to save that file and get the infamous “E212: Can’t open file for writing”, just issue that vim command in order to save the file without the need to save it to a temp file and then copy it back again.

 

python -m SimpleHTTPServer     #我应该会常用的
Serve current directory tree at http://$HOSTNAME:8000/

master

Stay hungry, stay foolish.

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