Linux Tips: Difference between revisions
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== The coma to point == | |||
if you are working with a configuration of linux which has not the dot "." as a standard format for floating points data (for instance the coma "," in french), you can add the following two lines in your .bashrc file: | |||
LC_NUMERIC=en_US | |||
export LC_NUMERIC | |||
this will make the job without too many side effects. | |||
==Handling jobs== | ==Handling jobs== | ||
* if you want to send a job on a computer and logout without killing the job: | * if you want to send a job on a computer and logout without killing the job: |
Revision as of 12:49, 14 October 2011
The coma to point
if you are working with a configuration of linux which has not the dot "." as a standard format for floating points data (for instance the coma "," in french), you can add the following two lines in your .bashrc file:
LC_NUMERIC=en_US export LC_NUMERIC
this will make the job without too many side effects.
Handling jobs
- if you want to send a job on a computer and logout without killing the job:
:> nohup ./job
Transferring files
- the scp command:
:> scp server:directory here
- if you do some regular updates, there is no -update option to scp. Then, better use the rsync command. For instance with
:> rsync -avub -e ssh server:data/*.gz data/
be careful with the slash after directory names, with or without is no exactly the same behavior. Look at man rsync before using it.
working with zip files
Linux usually provides a couple of command piping gzip
zgreg, zcat, zdiff, zless, zmore, zegrep,...
Here is a simple extension of tail and head for zipped files, that you can call ztail and zhead (example is for tail, replace "tail" with "head" everywhere to get zhead) and add to your own /bin directory: <source lang="bash">
- !/bin/bash
PATH=${GZIP_BINDIR-'/bin'}:$PATH
usage="Usage: $0 [OPTIONS]... [FILES]... Like 'tail', but operate on the uncompressed contents of any compressed FILEs.
Options are the same as for 'tail'."
case $1 in --help) exec echo "$usage";; -h) exec echo "$usage";; esac
options="" files="" for i in $@; do str="$i" if test -f $i && [ ${str:(-3)} = ".gz" ]; then
files=$files"$i "
else
if [ ${str:0:1} = "-" ] && [ $str != "-v" ] && [ $str != "--verbose" ]; then options=$options"$i " elif [ $str != "-v" ] && [ $str != "--verbose" ]; then echo -ne "***Warning: $i is neither a regular zip file or a regular option***\n\n" fi
fi done
for file in $files; do
echo "==>"$file"<==" exec gzip -cd $file | tail $options
done </source>