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How to base64 encode image in linux bash / shell
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You need to use cat to get the contents of the file named 'DSC_0251.JPG', rather than the filename itself.
test="$(cat DSC_0251.JPG | base64)"
However, base64 can read from the file itself:
test=$( base64 DSC_0251.JPG )
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Only get hash value using md5sum (without filename)
...the md5sum.
md5=($(md5sum file))
echo $md5
# 53c8fdfcbb60cf8e1a1ee90601cc8fe2
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What is the difference between CMD and ENTRYPOINT in a Dockerfile?
...ple is good, it shows how to use an image as a "binary". When using ["/bin/cat"] as entrypoint and then doing docker run img /etc/passwd, you get it, /etc/passwd is the command and is passed to the entrypoint so the end result execution is simply /bin/cat /etc/passwd.
Another example would be to ha...
Is there a performance difference between i++ and ++i in C++?
...ation units. Compiler with g++ 4.5.
Ignore the style issues for now
// a.cc
#include <ctime>
#include <array>
class Something {
public:
Something& operator++();
Something operator++(int);
private:
std::array<int,PACKET_SIZE> data;
};
int main () {
Something s...
In log4j, does checking isDebugEnabled before logging improve performance?
I am using Log4J in my application for logging. Previously I was using debug call like:
16 Answers
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How to elegantly deal with timezones
...f the files in the latest data distribution (I actually ran it against the ftp://elsie.nci.nih.gov/pub/tzdata2011k.tar.gz file on September 25, 2011; in March 2017, you'd get it via https://iana.org/time-zones or from ftp://fpt.iana.org/tz/releases/tzdata2017a.tar.gz).
So on sf4answers, after getti...
How do I view an older version of an SVN file?
...on:
svn update -r 666 file
Or you can just view the file directly:
svn cat -r 666 file | less
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combinations between two lists?
...gic behind how to do it? If I convert my code to C or Java, I won't have access to zip or itertools(although they make life very very easy)
– user1735075
Oct 17 '12 at 13:39
3
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What is better, curl or wget? [closed]
...functionality. While GNU wget is a package for retrieving files using HTTP/FTP, curl transfers data with single URL. As noted in the link shared by MarkusQ, wget can download recursively - see this comparison article for more details by the curl author.
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Given a filesystem path, is there a shorter way to extract the filename without its extension?
... This is actually quite useful when working with path on UNIX ftp servers.
– s952163
Jun 3 '19 at 22:59
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