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Find a class somewhere inside dozens of JAR files?

... Unix On Linux, other Unix variants, Git Bash on Windows, or Cygwin, use the jar (or unzip -v), grep, and find commands. The following lists all class files that match a given name: for i in *.jar; do jar -tvf "$i" | grep -...
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Tool to read and display Java .class versions

... On Unix-like file /path/to/Thing.class Will give the file type and version as well. Here is what the output looks like: compiled Java class data, version 49.0 ...
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How do I send a file as an email attachment using Linux command line?

... @fugitive means "end of options". Take a look at unix.stackexchange.com/questions/11376/… – rynop Feb 9 '17 at 16:27 ...
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what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?

...namenodehost). Most of the commands in FS shell behave like corresponding Unix commands. Differences are described with each of the commands. Error information is sent to stderr and the output is sent to stdout. If HDFS is being used, hdfs dfs is a synonym. ...
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RE error: illegal byte sequence on Mac OS X

... I think it's safe to say that the Unix world has embraced UTF-8 at this point: the default LC_CTYPE value is usually <lang_region>.UTF-8, so any file without a BOM (byte-order mark) is therefore interpreted as a UTF-8 file. It is only in the Windows wor...
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Compiling with g++ using multiple cores

... There is no such flag, and having one runs against the Unix philosophy of having each tool perform just one function and perform it well. Spawning compiler processes is conceptually the job of the build system. What you are probably looking for is the -j (jobs) flag to GNU make, ...
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What are the benefits of learning Vim? [closed]

... it useful? Yes. Reasons for Learning vi is guaranteed to exist on all Unix systems and exists on most Linux ones as well. That kind of broad coverage makes learning it worth it. It's much quicker to use vi for a sudo edit: $ sudo vi Also, GMail uses vi-ish commands for selecting & moving...
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What is NoSQL, how does it work, and what benefits does it provide? [closed]

...ability reasons, SQL engines tend to disregard the tremendous power of the UNIX operating system and its derivatives. With a filesystem-based database, you can take immediate advantage of the ever-increasing capabilities and power of the underlying operating system, which have been steadily increas...
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How do you format an unsigned long long int using printf?

... This isn't a Linux/UNIX thing, the "ll" length modifier was added to Standard C in C99, if it doesn't work in "Microsoft C" then it is because they are not standards compliant. – Robert Gamble Oct 17 '08 a...
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Python strftime - date without leading 0?

... can remove the leading zero. For example %Y/%-m/%-d. This only works on Unix (Linux, OS X), not Windows (including Cygwin). On Windows, you would use #, e.g. %Y/%#m/%#d. share | improve this ans...