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You can configure vim to not add the newline at the end. Unless your vim is already quite old, try to put into .vimrc a


set nofixendofline

Whether this is a wise choice, I'm not sure. In...

Getting no output just means that your pattern doesn't match the content of any line in fileB, or that count is greater than 6. You did not write how you set the variables COL1, COL2 etc. The...

Once more:

- Since interpolation of the variable does not work, as I explained, I suggested that you model your "pattern" not by a variable named PATTERN, but by an alias named PATTERN.

- Also...

In Posix shell, bash, ksh and zsh, splitting the command line into the individual commands, takes place before parameter expansion. Hence, the shell doesn't see the pipe inside your pattern.

BTW,...

I would write tail -n +2(with space). I think this is the "most canonical" form. On very old Unixes, the first variants of head and tail did not provide the -n switch. Then, for some time, I found it...

You can also use awk:


awk "NR >= $from_line && NR <= $to_line {print}" $filename

This is not correct.

While the maximum line length of a bash command line depends on the operating system where bash is running, I am not aware of systems where this length would be less than...

For instance using grep:

grep -v '[^ ] [^ ]' your_file

I guess you mean that you want to *rewrite* it as a shell script (because Windows Batch is so different from all reasonable shell languages that the idea of "conversion" does not really apply).
...

So, basically, you want to test, whether a number containing a decimal point is larger than 600?

If you are using Zsh as a shell, you have decimal arithmetic, and can simply compare the number you...

I don't think it is "a line", but several lines; at least it follows from his comment. So in any case, he must have some program which extracts a set of lines from the input file and writes these to...

Interesting point. I tried it with a 300MB file, using Cygwin grep, and searching for a fixed string with various settings. I repeated each run 3 times. Here the times

with -F:

0.27s user 0.08s...

Since you are mentioning cksum, I assume that you mean the CRC checksum.

Look at this article for a Pure-Perl implementation:

Perl-only CRC32 function (without C code)...

For a HERE document written in the OP's way, wouldn't the EOF have to be in the leftmost column?

Scotts solution has the disadvantage that, if someone would enter 00 as the second number, you would still get a division by zero.

In general, I prefer testing numerical values in numerical...

{ head -n -1 complex.gro; cat lig.gro; tail -n 1 complex.gro; } >combined.gro

The echo-line doesn't make any sense. You are writing something to the bitbucket? What for? Also, you create a variable DATE, but never use it. Finally, shell scripts which really loop permanently...

This is possibly a duplicate posting to the thread

https://www.unix.com/shell-programming-and-scripting/275073-script-check-files-existence-inside-directory.html?posted=1#post303006244

which...

Some people are more choosy than others! :D

It is of course a matter of taste. I personally don't like your solution so much, because it globs for the files twice (in the while- and in the for-loop), which makes maintenance more difficult...

You can wrap your for-loop by an infinite loop, end exit the script once you did your calculation:


while true
do
for ...
do
...
exit 0
done
sleep 123
done

If it waits for the full 30 minutes, it means that expect does not see the string you are waiting for.

You are writing
expect -exact "(.*)## $"

which means that you are waiting for the string...

Let's line out the basic idea:

I would first read the content of each directory into a separate array, in this case 3 arrays (A, B, C). Then I would set up an associative array (let's call it...

if [[ NF == 10 && $retval -eq 1 ]]

will always evaluate to false, because the constrant string NF is not equal to the constant string 10.

Like Don Cragun said, I really don't see a point in your goal, and why you try to reinvent cron, but if you really want to do:

You are thinking of an infinite loop. Well, in your example code, you...