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Bash command to sum a column of numbers [duplicate]
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Using existing file:
paste -sd+ infile | bc
Using stdin:
<cmd> | paste -sd+ | bc
Edit:
With some paste implementations you need to be more explicit when reading from stdin:
<cmd> | paste -sd+ - | bc
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error_log per Virtual Host?
...running Apache and PHP 5, we have multiple Virtual Hosts with separate log files. We cannot seem to separate the php error_log between virtual hosts.
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How do I put my website's logo to be the icon image in browser tabs?
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That image is called 'favicon' and it's a small square shaped .ico file, which is the standard file type for favicons. You could use .png or .gif too, but you should follow the standard for better compatibility.
To set one for your website you should:
Make a square image of your logo (pre...
How do I create a MongoDB dump of my database?
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To put the results in a single compressed file, see unix.stackexchange.com/questions/93139/…
– Donal Lafferty
Aug 27 '15 at 8:52
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Search all of Git history for a string? [duplicate]
...n source. In this git-controlled source tree, I have certain configuration files which contain passwords. I made sure not to track this file and I also added it to the .gitignore file. However, I want to be absolutely positive that no sensitive information is going to be pushed, perhaps if somethi...
Tomcat startup logs - SEVERE: Error filterStart how to get a stack trace?
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My instance of Tomcat 5.5 doesn't write that file.
– Arne Evertsson
Nov 7 '10 at 11:52
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Xcode duplicate line
...d Halley's steps on version 4.3.2 ... I suggest you backup up the original file and then open it in Xcode itself (and not in TextEdit). Also, regarding the permissions: changing them (only for the file itself; no recursion needed) in Finder worked just fine.
– Blaz
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Saving grid.arrange() plot to file
...d, doesn't draw anything but returns a grob g, that you can pass to ggsave(file="whatever.pdf", g).
The reason it works differently than with ggplot objects, where by default the last plot is being saved if not specified, is that ggplot2 invisibly keeps track of the latest plot, and I don't think g...
Android encryption / decryption using AES [closed]
Is there a good example of how to encrypt and decrypt image and other files with AES on Android?
11 Answers
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Linux command to print directory structure in the form of a tree
...y a number, to specify the max recursion depth.
Remove -d to display also files.
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