Commands by lpb612 (3)

  • find duplicate messages in a Maildir

    # find assumes email files start with a number 1-9 # sed joins the lines starting with " " to the previous line # gawk print the received and from lines # sort according to the second field (received+from) # uniq print the duplicated filename # a message is viewed as duplicate if it is received at the same time as another message, and from the same person. The command was intended to be run under cron. If run in a terminal, mutt can be used: mutt -e "push otD~=xq" -f $folder Show Sample Output


    2
    find $folder -name "[1-9]*" -type f -print|while read file; do echo $file $(sed -e '/^$/Q;:a;$!N;s/\n //;ta;s/ /_/g;P;D' $file|awk '/^Received:/&&!r{r=$0}/^From:/&&!f{f=$0}r&&f{printf "%s%s",r,f;exit(0)}');done|sort -k 2|uniq -d -f 1
    lpb612 · 2013-01-21 22:50:51 9
  • edit a executable script

    vie myscript will find where myscript is, and then use vi to edit that file. Not much trick, but saves typing if you use it a lot.


    0
    vie(){vi $(which $1)}
    lpb612 · 2011-10-03 15:07:19 9
  • Re-use the previous command output

    The $(!!) will expand to the previous command output (by re-running the command), which becomes the parameter of the new command newcommand.


    8
    newcommand $(!!)
    lpb612 · 2011-09-01 21:02:17 6

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Makes a Zenity select list based on entries in your wpa_supplicant.conf
If you still connect to your wireless access point manually and need to use wpa_supplicant, the above fu will grep all of the known SSID from your wpa_supplicant.conf file, present it in a Zenity list and return the SSID name you choose. I've wrapped this command in to a bash script that then up's the interface, associates and autenticates. Saves me from using NetworkManager ;)

Display 6 largest installed RPMs sorted by size (descending)
Low on disk space? Check the largest installed RPMs for delete canditates.

Show crontabs for all users
added echo "### Crontabs for $user ####"; to make clear whose crontab is listed.

use wget to check if a remote file exists

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Convert JSON to YAML
Convert JSON to YAML. Note that you'll need to have PyYaml installed.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Install pip with Proxy
Installs pip packages defining a proxy

check open ports without netstat or lsof

python smtp server
This command will start a simple SMTP server listening on port 1025 of localhost. This server simply prints to standard output all email headers and the email body.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: