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I am new to linux but trying my best. Its my first post but I give up trying to solve it. I want to store the result of wc -l as a variable so I can use it later in my script...so far unsuccessfully.
It will work, but it gets messy quickly. You can much more efficiently use a variable in memory (which is very fast) rather than writing to a disk (which is very slow). Whilst this difference in speed is negligible when you're only doing this once or twice, as soon as you start doing this thousands of times, this process really bogs everything down. Writing to a file also means you have to clean up after yourself, which can be a bit of a headache.
Variables were invented to avoid having to write to disk
returns nothing. I would like to omit writing the output into the file (need to repeat it 1000 times). The thing is that wc -l command is part of a longer code:
Setting a variable does not emit any output, and "echo" doesn't need any input to get $var's value. Also, you aren't piping anything into wc. And lastly, commands separated by pipes are executed at the same time, not in sequence.
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