In a Unix shell, if I want to combine stderr and stdout into the stdout stream for further manipulation, I can append the following on the end of my command: 2>&1 So, if I want to use "head" on the output from g++, I can do something like…
[Bash's ArithmeticExpression] let command: let a=17+23 echo "a = $a" # Prints a = 40 let a=17 + 23 # WRONG let a="17 + 23" # Right let a=28/6 echo "a = $a" # Prints a = 4 In addition to the let command, one may use the (( )) …
In bash shell, when you use a dollar sign followed by a variable name, shell expands the variable with its value. This feature of shell is called parameter expansion. But parameter expansion has numerous other forms which allow you to expand a parame…
References: [1] http://www.tldp.org/LDP/Bash-Beginners-Guide/html/ 1. Executing programs from a script When the program being executed is a shell script, bash will create a new bash process using a fork. This subshell reads the lines from the shell s…
很多年前,记得在Windows Server2008的Feature里发现了Windows Subsystem For Unix,当时也不知道干啥用的,还以为是Samba协议用的呢. 今天,发现Windows Subsystem For Unix变成了Windows Subsystem For Lnuix(Beta),支持Bash on Ubuntu on Windows了. 真是的非常的棒,在RedHat和Android上积攒的Linux命令,终于派上大用场了.…
https://unix.stackexchange.com/questions/171519/lsof-warning-cant-stat-fuse-gvfsd-fuse-file-system FUSE and its access rights lsof by default checks all mounted file systems including FUSE - file systems implemented in user space which have special a…
It is a security feature introduced in the latest version of RVMhttps://github.com/wayneeseguin/rvm/releases/tag/1.26.0 You just need to follow the instruction to import the key: $ gpg2 --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3 ==========…
BASH(1) General Commands Manual BASH(1) NAME bash - GNU Bourne-Again SHell SYNOPSIS bash [options] [command_string | file] COPYRIGHT Bash is Copyright (C) 1989-2013 by the Free Software Foundation, Inc. DESCRIPTION Bash is an sh-compatible command la…
In the process of our Personal Photo Experience Project, There are some bugs which hinder our forwards. But through our spirit of perserverance,We have already fixed them and make our product more excellent. So following are some bug list and the how…
1 # Bash on ubuntu on Windows http://www.cnblogs.com/anonymous-ufo/p/6143480.html 1 1 如何启用Bash on ubuntu on Windows 微软在 Build 2016 大会上宣布将 Bash Shell 带到 Windows 10 当中进行原生集成,并进行了相关效果演示.消息一经发布,不仅在 Windows 社区,更是在 Linux 社区引起了轰动.现在我们来说说具体的 Bash on ubuntu…
坏味道--依恋情结(Feature Envy) 特征 一个函数访问其它对象的数据比访问自己的数据更多. 问题原因 这种气味可能发生在字段移动到数据类之后.如果是这种情况,你可能想将数据类的操作移动到这个类中. 解决方法 As a basic rule, if things change at the same time, you should keep them in the same place. Usually data and functions that use this data ar…
使用Visual Studio 2013创建一个可视web 部件,当右击项目选择"部署"时报错: "Error occurred in deployment step 'Add Solution': A feature with ID 15/3e472a61-bbc9-4242-87c7-a07e8e3fab99 has already been installed in this farm. Use the force attribute to explicitly re-…
