Commands by dakira

Commands by dakira (5)

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Download all files from podcast RSS feed

Neither of the others worked for me. This does.
This is sample output - yours may be different.
1

curl http://url/rss | grep -o '<enclosure url="[^"]*' | grep -o '[^"]*$' | xargs wget -c

dakira · 2016-05-29 12:07:21 13
Show UDID of iPhone

Display the serial of the iPhone (aka UDID). Show Sample Output
This is sample output - yours may be different.
```
<40  HEX-chars>
```
3

lsusb -s :`lsusb | grep iPhone | cut -d ' ' -f 4 | sed 's/://'` -v | grep iSerial | awk '{print $3}'

dakira · 2011-11-03 20:39:43 10
Remove old kernels and header data in Ubuntu/Debian

Removes all kernels and corresponding packages except of the one you're currently using.
This is sample output - yours may be different.
0

sudo apt-get -y purge $(dpkg --get-selections | awk '((/^linux-/) && (/[0-9]\./) && (!/'"`uname -r | sed "s/-generic//g"`"'/)) {print $1}')

dakira · 2011-08-04 14:02:02 4
Find all files <10MB and sum up their size

files
This is sample output - yours may be different.
0

i=0; for f in $(find ./ -size -10M -exec stat -c %s {} \; ); do i=$(($i + $f)); done; echo $i

dakira · 2010-01-08 15:47:35 1
convert uppercase files to lowercase files
This is sample output - yours may be different.
20

rename 'y/A-Z/a-z/' *

dakira · 2009-02-22 20:42:10 10

What's this?

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Recursively remove .svn directories

Print just line 4 from a textfile

Prints the 4th line and then quits. (Credit goes to flatcap in comments: http://www.commandlinefu.com/commands/view/6031/print-just-line-4-from-a-textfile#comment.)

vi a remote file with port

If you are running sshd on different port use above this command to edit/view remote file with vi/vim. In above example I am using port 12345.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

find duplicate processes

This command will allow to search for duplicate processes and sort them by their run count. Note that if there are same processes run by different users you'll see only one user in the result line, so you'll need to do: $ ps aux | grep to see all users that run this command.

32 bits or 64 bits?

Easy and direct way to find this out.

Sort and count subjects of emails stuck in Exim queue

Be notified about overheating of your CPU and/or motherboard

You'll be notified if your core 1 temperature exceeds 50 degrees, you can change the monitored device by editing the "Core 1" or change the critical temperature by editing the "-gt 50" part. Note: you must have lm-sensors installed and configured in order to get this command working.

processes per user counter

No need for sort

Downsample mp3s to 128K

This will lower the quality of mp3 files, but is necessary to play them on some mobile devices.

Stay in the loop…

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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.

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