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How to delete from a text file, all lines that contain a specific string?
How would I use sed to delete all lines in a text file that contain a specific string?
17 Answers
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Are HTTPS headers encrypted?
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The whole lot is encrypted† - all the headers.
That's why SSL on vhosts doesn't work too well - you need a dedicated IP address because the Host header is encrypted.
†The Server Name Identification (SNI) standard means that the hostname may not be encr...
How can I calculate an md5 checksum of a directory?
I need to calculate a summary md5 checksum for all files of a particular type ( *.py for example) placed under a directory and all sub-directories.
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When to use Storyboard and when to use XIBs
...ng Storyboards. My learnings are:
Storyboards are nice for apps with a small to medium number of screens and relatively straightforward navigation between views.
If you have lots of views and lots of cross-navigation between them the Storyboard view gets confusing and too much work to keep clean.
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How do I use 'git reset --hard HEAD' to revert to a previous commit? [duplicate]
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First, it's always worth noting that git reset --hard is a potentially dangerous command, since it throws away all your uncommitted changes. For safety, you should always check that the output of git status is clean (that is, empty) before using it.
Initially you say the following:
So ...
How to get Vim to highlight non-ascii characters?
...aracter range, therefore highlighting (assuming you have hlsearch enabled) all other characters lying outside the ASCII range:
/[^\x00-\x7F]
This will do a negative match (via [^]) for characters between ASCII 0x00 and ASCII 0x7F (0-127), and appears to work in my simple test. For extended ASCII,...
How do I change db schema to dbo
...rted a bunch of tables from an old sql server (2000) to my 2008 database. All the imported tables are prefixed with my username, for example: jonathan.MovieData . In the table properties it lists jonathan as the db schema. When I write stored procedures I now have to include jonathan. in f...
Tar a directory, but don't store full absolute paths in the archive
...-C works; just for clarification I'll post 2 examples:
creation of a tarball without the full path:
full path /home/testuser/workspace/project/application.war and what we want is just project/application.war so:
tar -cvf output_filename.tar -C /home/testuser/workspace project
Note: there is a ...
Get TFS to ignore my packages folder
...n't. Why? Who knows, the ways of Microsoft are strange and mysterious. Actually, I think it's part of the NuGet stuff I outline below, but if that ever gets fixed in the future and you want to keep the repositories.config file instead of letting VS regenerate it, you should be able to use this:
\pa...
Strings in a DataFrame, but dtype is object
...mly requested element. The key to overcoming this is to use pointers. Basically, store each string in some random memory location, and fill the array with the memory address of each string. (Memory addresses are just integers.) So now, things look like this
Now, if you ask your computer to fetch th...