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How to find Unused Amazon EC2 Security groups
...ext | tr '\t' '\n'
Then get all security groups tied to an instance, then piped to sort then uniq:
aws ec2 describe-instances --query 'Reservations[*].Instances[*].SecurityGroups[*].GroupId' --output text | tr '\t' '\n' | sort | uniq
Then put it together and compare the 2 lists and see what's not ...
Escape double quotes in parameter
...ial and error implies that in the initial state, redirection (to a file or pipe) is recognized and a caret ^ escapes a double quote and the caret is removed from the input. In the other state, redirection is not recognized and a caret does not escape a double quote and isn't removed. Let's refer t...
What is the exact meaning of Git Bash?
...FT focuses all their attention on PS. It's pretty nice, really, taking the pipe-oriented features of Unix-based shells (bash, sh, csh, ksh, zsh, etc.) and extending them to allow passing objects, vs just text.
– Peter Halverson
Feb 22 '19 at 19:12
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Exploitable PHP functions
...`` (backticks) - Same as shell_exec()
popen - Opens read or write pipe to process of a command
proc_open - Similar to popen() but greater degree of control
pcntl_exec - Executes a program
PHP Code Execution
Apart from eval there are other ways to execute PHP code: include/requir...
Best approach to real time http streaming to HTML5 video client
... MP4 and I had to tune the FFMPEG parameters, and the standard node stream pipe redirection over http that I used originally was all that was needed.
In MP4 there is a 'fragmentation' option that breaks the mp4 into much smaller fragments which has its own index and makes the mp4 live streaming opt...
What are the differences between git remote prune, git prune, git fetch --prune, etc
...l local branches that don't have a corresponding remote branch. You could pipe this to xargs git branch -D, but note that any new branches you've created but never pushed to the server would be deleted, so tread carefully: git branch -r | awk '{print $1}' | egrep -v -f /dev/fd/0 <(git branch -v...
What specific productivity gains do Vim/Emacs provide over GUI text editors?
...stems, ctags, etc.) than most editors. Even something simple like :.!, to pipe a command's output into a buffer, is something you won't find in most GUI editors.
A tabbed interface is not as nice as the "windowed" interface that Vim/Emacs give you. You can see two or more files at the same time si...
Is there a way to cache GitHub credentials for pushing commits?
I recently switched to synchronizing my repositories to https:// on GitHub (due to firewall issues), and it asks for a password every time.
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Bash tool to get nth line from a file
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head and pipe with tail will be slow for a huge file. I would suggest sed like this:
sed 'NUMq;d' file
Where NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file.
Explan...
What is the difference between 'classic' and 'integrated' pipeline mode in IIS7?
... IIS.
Integrated mode, on the other hand, is a new mode in IIS7 where IIS pipeline is tightly integrated (i.e. is just the same) as ASP.NET request pipeline. ASP.NET can see every request it wants to and manipulate things along the way. ASP.NET is no longer treated as an external plugin. It's compl...