⌘T | go to file |
⌘⌃P | go to project |
⌘R | go to methods |
⌃G | go to line |
⌘KB | toggle side bar |
⌘⇧P | command prompt |
May be you got a warinning message when you execute do-release-upgrade:
Not enough free disk space
The upgrade has aborted. The upgrade needs a total of
xxx
M free space on disk '/boot'. Please free at least an additionalxxx
M of disk space on '/boot'. Empty your trash and remove temporary packages of former installations using 'sudo apt-get clean'.
Because your /boot partition is filled with old kernels. You can easily remove the old kernels if you know which packages they came in.
^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$ | |
// Match | |
2009-12T12:34 | |
2009 | |
2009-05-19 | |
2009-05-19 | |
20090519 | |
2009123 |
#CURL参考资料
###下载单个文件,默认将输出打印到标准输出中(STDOUT)中
curl http://www.centos.org
#Get Gravatar image using command line(Mac OS X only)
Gravatar image download url
http://www.gravatar.com/avatar/HASH
Get default image
curl -o yourname.png http://www.gravatar.com/avatar/$(md5 -q -s youremail@example.com)
#Force the user to change their password at first login
You can just expire that password. After creating a new user foo
, just type:
$ sudo chage -d 0 foo
And he will be forced to change it after first logon.
#SSH Login without password
- Create public and private keys using ssh-keygen on local-host
$ ssh-keygen
or
# Creates a new ssh key, using the provided email as a label
$ ssh-keygen -t rsa -C "your_email@example.com"
# Install MacTex: http://mirror.ctan.org/systems/mac/mactex/mactex-basic.pkg | |
$ sudo chown -R `whoami` /usr/local/texlive | |
$ tlmgr update --self | |
$ tlmgr install ucs | |
$ tlmgr install etoolbox | |
# Install pandoc view homebrew | |
$ brew install haskell-platform | |
$ cabal install pandoc |