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eval command in Bash and its typical uses
...words) and then treats each word as a wildcard pattern. For example:
$ ls
file1 file2 otherfile
$ set -- 'f* *'
$ echo "$1"
f* *
$ echo $1
file1 file2 file1 file2 otherfile
$ n=1
$ eval echo \${$n}
file1 file2 file1 file2 otherfile
$eval echo \"\${$n}\"
f* *
$ echo "${!n}"
f* *
eval is not used v...
Create a tar.xz in one command
...ion for xz. And remember to man tar :)
tar cfJ <archive.tar.xz> <files>
Edit 2015-08-10:
If you're passing the arguments to tar with dashes (ex: tar -cf as opposed to tar cf), then the -f option must come last, since it specifies the filename (thanks to @A-B-B for pointing that out!)...
A Windows equivalent of the Unix tail command [closed]
...of the Unix 'tail' command that will allow me to watch the output of a log file while it is being written to.
26 Answers
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How to import a Python class that is in a directory above?
I want to inherit from a class in a file that lies in a directory above the current one.
7 Answers
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How can I get the assembly file version
...ly = System.Reflection.Assembly.GetExecutingAssembly();
System.Diagnostics.FileVersionInfo fvi = System.Diagnostics.FileVersionInfo.GetVersionInfo(assembly.Location);
string version = fvi.FileVersion;
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NodeJS: Saving a base64-encoded image to disk
... the browser (generated from canvas with toDataURL() ) and writing it to a file. But the file isn't a valid image file, and the "file" utility simply identifies it as "data".
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How to write to a JSON file in the correct format
I am creating a hash in Ruby and want to write it to a JSON file, in the correct format.
4 Answers
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Unable to copy file - access to the path is denied
...
I solved this problem by deleting the contentious files from bin folder and rebuilding the project.
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How to create a hex dump of file containing only the hex characters without spaces in bash?
How do I create an unmodified hex dump of a binary file in Linux using bash? The od and hexdump commands both insert spaces in the dump and this is not ideal.
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PHP Composer update “cannot allocate memory” error (using Laravel 4)
...rsion can fix the issue.
Also you should be committing your composer.lock file and doing a composer install on a production environment which is less resource intensive.
More details here:
https://github.com/composer/composer/issues/1898#issuecomment-23453850
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