Check These Out
The above is an example of grabbing only the first column. You can define the start and end points specifically by chacater position using the following command:
$ while read l; do echo ${l:10:40}; done < three-column-list.txt > column-c10-c40.txt
Of course, it doesn't have to be a column, or extraction, it can be replacement
$ while read l; do echo ${l/foo/bar}; done < list-with-foo.txt > list-with-bar.txt
Read more about parameter expansion here:
http://wiki.bash-hackers.org/syntax/pe
Think of this as an alternative to awk or sed for file operations
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"
shows some logging for the git repo.
There's probably a more efficient way to do this rather than the relatively long perl program, but perl is my hammer, so text processing looks like a nail.
This is of course a lot to type all at once. You can make it better by putting this somewhere:
$ clf () { (curl -d "q=$@" http://www.commandlinefu.com/search/autocomplete 2>/dev/null) | egrep 'autocomplete|votes|destination' | perl -pi -e 's/$/\n\n/g;s/^ +|\([0-9]+ votes,//g;s/^\//http:\/\/commandlinefu.com\//g'; }
Then, to look up any command, you can do this:
$ clf diff
This is similar to http://www.colivre.coop.br/Aurium/CLFUSearch except that it's just one line, so more in the spirit of CLF, in my opinion.
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video).
$ cat /proc/acpi/video/VGA/LCD/brightness
to discover the possible values for your display.
Useful when checking MySQL status.
Trace python statement execution and syscalls invoked during that simultaneously
Copy this function to command line, press 'Enter' 'f'' 'Enter' to execute (sentence on the left written only for newbies). Hint 'e|x|v|1..9' in front of displayed last modified file name means: "Press 'e' for edit,'x' for execute,'v' for view or a digit-key '1..9' to touch one file from the recent files list to be last modified" and suggested (hidden files are listed too, else remove 'a' from 'ls -tarp' statement if not intended).
If you find this function useful you can then rename it if needed and append or include into your ~/.bashrc config script. With the command
$ . ~/.bashrc
the function then can be made immediately available.
In the body of the function modifications can be made, i.e. replaced joe editor command or added new option into case statement, for example 'o) exo-open $h;;' command for opening file with default application - or something else (here could not be added since the function would exceed 255 chars).
To cancel execution of function started is no need to press Ctrl-C - if the mind changed and want to leave simple Enter-press is enough. Once defined, this function can with
$ typeset -f f
command be displayed in easy readable form