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How to delete duplicate lines in a file without sorting it in Unix?
Is there a way to delete duplicate lines in a file in Unix?
9 Answers
9
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Allow Google Chrome to use XMLHttpRequest to load a URL from a local file
When trying to do a HTTP request using XMLHttpRequest from a local file, it basically fails due to Access-Control-Allow-Origin violation.
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How do I change the root directory of an apache server? [closed]
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You need to change the DocumentRoot setting in your httpd.conf file. Chances are it will be under something like /etc/apache2/conf/httpd.conf
Use your favourite editor (I recommend Vim) and look for the DocumentRoot and change it to /users/spencer/projects. Also look a little further d...
Tool for comparing 2 binary files in Windows [closed]
I need a tool to compare 2 binaries. The files are quite large. Some freeware or trial tools I found on the Internet are not convenient to use for large files. Can you recommend me some tools?
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Search for executable files using find command
...xecutable predicate in GNU find. In particular, -executable tests that the file can be executed by the current user, while -perm +111 just tests if any execute permissions are set.
Older versions of GNU find also support the -perm +111 syntax, but as of 4.5.12 this syntax is no longer supported. In...
Import text file as single character string
How do you import a plain text file as single character string in R? I think that this will probably have a very simple answer but when I tried this today I found that I couldn't find a function to do this.
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Get a list of all the files in a directory (recursive)
I'm trying to get (not print, that's easy) the list of files in a directory and its sub directories.
4 Answers
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No appenders could be found for logger(log4j)?
... add this standard log4j.properties (taken from the above mentioned guide) file to your classpath:
# Set root logger level to DEBUG and its only appender to A1.
log4j.rootLogger=DEBUG, A1
# A1 is set to be a ConsoleAppender.
log4j.appender.A1=org.apache.log4j.ConsoleAppender
# A1 uses PatternLayo...
How to convert a PNG image to a SVG? [closed]
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potrace does not support PNG as input file, but PNM.
Therefore, first convert from PNG to PNM:
convert file.png file.pnm # PNG to PNM
potrace file.pnm -s -o file.svg # PNM to SVG
Explain options
potrace -s => Output file is SVG
potrace -o file.sv...
git update-index --assume-unchanged returns “fatal unable to mark file”
... indicated above, and had the same results. This included the fact that my file was listed when executing git ls-files -o. However in my case, I also tried executing git update-index --assume-unchanged against a file that was not listed when executing ls-files -o, and I still received the same erro...