Useful command

A list comprised of a brief description of few usueful command is given.

grep

It will search word patterns for you in selected documents or a list of them

grep -w -R "foo"

where the -w flag stands for word while -R for research in subdirectories. It will search all the file names that in which he finds a pattern (in this case: foo).

mmv

Rename more than one file at once, extension included:

mmv '\*.STL' '\#1.stl'

tail

To check running simulation written in a log file, it is possible to see in terminal the live writing

tail -f  foo.log

sed

For replacing the text repetitively in file stream:

find . -type f | xargs sed -i s/<oldWord>/<newWord>/g

The above chains of commands will change the content of every file that constains an oldWorld pattern substituting it with newWord.

cp

A useful usage of the copy utility follows. for example, to copy a file in different directory, execute:

ls -d processor* | xargs -i cp -r 0.orig/* ./{}/0

find

To find the correct case frame in tutorial, follows simlar commands chain:

find $FOAM_TUTORIALS -type f | xargs grep -r <wordYouAreInterestedIn>              # It will search in all tutorial files 
find $FOAM_TUTORIALS -name controlDict | xargs grep -r <wordYouAreInterestedIn>    # It will search in all controlDict files

Which list controlDict files where the word foo have been found

If you want to know how the continuity errors are computed use find in this way:

$FOAM_SRC –iname *continuity*

and open any of the files.