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Split output of command by columns using Bash?
...; done
will then output the 3rd column. As indicated in my comment...
A piped read will be executed in an environment that does not pass variables to the calling script.
out=$(ps whatever | { read a b c d; echo $c; })
arr=($(ps whatever | { read a b c d; echo $c $b; }))
echo ${arr[1]} # wil...
Is there a Unix utility to prepend timestamps to stdin?
...p awk adds will be the time that the end of the line appeared on its input pipe.
If awk shows errors, then try gawk instead.
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how to show lines in common (reverse diff)?
...mm -1 -2 file1.sorted file2.sorted
# where file1 and file2 are sorted and piped into *.sorted
Here's the full usage of comm:
comm [-1] [-2] [-3 ] file1 file2
-1 Suppress the output column of lines unique to file1.
-2 Suppress the output column of lines unique to file2.
-3 Suppress the output col...
Best way to convert text files between character sets?
...d close file
filename.txt : path to the file
" : qotes are here because of pipes. (otherwise bash will use them as bash pipe)
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Load different colorscheme when using vimdiff
... Is it possible to call more than one command between the two pipes "|"? I would be interested in return to original colorscheme after using vimdiff from vim too...
– Somebody still uses you MS-DOS
Jun 14 '10 at 13:30
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How can I get a java.io.InputStream from a java.lang.String?
...
Well, one possible way is to:
Create a PipedOutputStream
Pipe it to a PipedInputStream
Wrap an OutputStreamWriter around the PipedOutputStream (you can specify the encoding in the constructor)
Et voilá, anything you write to the OutputStreamWriter can be read fro...
How do I change the working directory in Python?
...with this horrible hack:
def quote_against_shell_expansion(s):
import pipes
return pipes.quote(s)
def put_text_back_into_terminal_input_buffer(text):
# use of this means that it only works in an interactive session
# (and if the user types while it runs they could insert characters...
Running Windows batch file commands asynchronously
...b *.mpg grabs a list of .mpg files in my current directory, the | operator pipes this list into ppx2, which then builds a series of commands to be executed in parallel; 4 at a time, as specified here by the -P 4 operator. The -L 1 operator tells ppx2 to only send one line of our directory listing t...
Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
...peat take n
(streamArrs(1 << 25, 1 << 14).zipWithIndex
pipe process1.chunk(4)
pipe process1.fold(0L) {
(c, vs) => c + vs.map(_._1.length.toLong).sum
}).runLast.run
This should work with any value for the n parameter (provided you're willing to wait long enough) ...
Cloning a MySQL database on the same MySql instance
...
As the manual says in Copying Databases you can pipe the dump directly into the mysql client:
mysqldump db_name | mysql new_db_name
If you're using MyISAM you could copy the files, but I wouldn't recommend it. It's a bit dodgy.
Integrated from various good other answe...