command-line

问题 How can I do something like command > file in a way that it appends to the file, instead of overwriting? 回答1: Use >> to append: command >> file 回答2: Yeah. command >> file to redirect just stdout of command . command >> file 2>&1 to redirect stdout and stderr to the file (works in bash, zsh) And if you need to use sudo , remember that just sudo command >> /file/requiring/sudo/privileges does not work, but simply using tee solves the problem: command | sudo tee -a /file/requiring/sudo

问题 How can I do something like command > file in a way that it appends to the file, instead of overwriting? 回答1: Use >> to append: command >> file 回答2: Yeah. command >> file to redirect just stdout of command . command >> file 2>&1 to redirect stdout and stderr to the file (works in bash, zsh) And if you need to use sudo , remember that just sudo command >> /file/requiring/sudo/privileges does not work, but simply using tee solves the problem: command | sudo tee -a /file/requiring/sudo

问题 How can I do something like command > file in a way that it appends to the file, instead of overwriting? 回答1: Use >> to append: command >> file 回答2: Yeah. command >> file to redirect just stdout of command . command >> file 2>&1 to redirect stdout and stderr to the file (works in bash, zsh) And if you need to use sudo , remember that just sudo command >> /file/requiring/sudo/privileges does not work, but simply using tee solves the problem: command | sudo tee -a /file/requiring/sudo

问题 I'm trying to create a multi-level pipe, where the input is Linux commands (e.g. ls | sort) and the output is just the regular output when typed into a Linux console (essentially just use execlp to execute the commands). I've attempted to create a program that works for 1 and 2 levels, but I can't seem to get the 2 level one to work, specifically with the command "ls | sort". The program just freezes. I also don't know how to continue beyond that and add more levels (required to support 16

问题 I've followed the instructions presented on: https://medium.freecodecamp.org/jazz-up-your-bash-terminal-a-step-by-step-guide-with-pictures-80267554cb22 I've jazzed up my terminal, but am running into an issue where my terminal consistently shows (e) base as part of the prompt. Google and https://powerline.readthedocs.io/en/master/ have not led me to an answer as of yet. 回答1: Executing source deactivate removed (e) base. Answer via: How to leave/exit/deactivate a python virtualenv? If you are

问题 I need to write a batch file to unzip files to their current folder from a given root folder. Folder 0 |----- Folder 1 | |----- File1.zip | |----- File2.zip | |----- File3.zip | |----- Folder 2 | |----- File4.zip | |----- Folder 3 |----- File5.zip |----- FileN.zip So, I wish that my batch file is launched like so: ocd.bat /d="Folder 0" Then, make it iterate from within the batch file through all of the subfolders to unzip the files exactly where the .zip files are located. So here's my

问题 How can I use the tools included in the VS command prompt ( Programs | MS Visual Studio 2008 | Visual Studio Tools | Visual Studio 2008 Command Prompt ) from any command prompt (ie without calling vcvarsall.bat ) or program? 回答1: The easiest way to do this is to add the PATH, INCLUDE, LIB and LIBPATH environment variables that are listed in the vsvarsXX.bat file for VS2005 on a 32 bit Intel box. Here's the sample for vsvars32.bat: @SET VSINSTALLDIR=C:\Program Files\Microsoft Visual Studio 8

问题 I have a monitoring script that I'd like to pop up a "toast window" when it detects that something happens. Is there a simple executable available that I can just run to do this? I know it's relatively easy to write such a thing, but I'd rather just use an existing program if there's one available. 回答1: The GrowlNotify software has a Windows version here. 回答2: QuickMacros is also capable of doing this but it is $40....it does however cook your breakfast as well... ;) 回答3: There's also Snarl

问题 In a Windows 8 Command Prompt, I had a backup drive plugged in and I navigated to my User directory. I executed the command: copy Documents G:/Seagate_backup/Documents What I assumed was that copy would create the Documents directory on my backup drive and then copy the contents of the C: Documents directory into it. That is not what happened! I proceeded to wipe my hard-drive and re-install the operating system, thinking I had backed up the important files, only to find out that copy

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Full command line as it was typed sys.argv is already a parsed array, losing double quotes, double spaces and maybe even tab characters (it all depends on the OS/shell, of course). How can I access the original string before parsing? 回答1: Shortly, you don't. Long: on Unix command line is parsed by the calling program and by the time python starts you already have the command line parsed. PS. On Windows it is