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Send web page by e-mail

This will send the web page at $u to recipient@example.com . To send the web page to oneself, recipient@example.com can be replaced by $(whoami) or $USER. The "charset" is UTF-8 here, but any alternative charset of your choice would work. `wget -O - -o /dev/null $u` may be considered instead of `curl $u` . On some systems the complete path to sendmail may be necessary, for instance /sys/pkg/libexec/sendmail/sendmail for some NetBSD.
This is sample output - yours may be different.
-1

{ u="http://twitter.com/commandlinefu"; echo "Subject: $u"; echo "Mime-Version: 1.0"; echo -e "Content-Type: text/html; charset=utf-8\n\n"; curl $u ; } | sendmail $USER

pascalvaucheret · 2010-02-24 04:18:30 5
Burn an ISO on command line with hdiutil on mac
This is sample output - yours may be different.
0

hdiutil burn foo.iso

putnamhill · 2010-02-23 23:38:09 3
Burn an ISO on commandline with wodim instead cdrecord
This is sample output - yours may be different.
-2

wodim foo.iso

SlimG · 2010-02-23 21:58:31 3
A little bash daemon =)

You don't want the -ar parameters in this case. The man page for BASH_BUILTINS(1) states: "-a option means to remove or mark all jobs" and "-r option without a jobspec argument restricts operation to running jobs" In this case we are supplying the process id of the job to disown so neither of these should be used.
This is sample output - yours may be different.
-2

echo "Starting Daemon"; ( while :; do sleep 15; echo "I am still running =]"; done ) & disown -h $!

daleki · 2010-02-23 19:17:05 3
Using mplayer to play the audio only but suppress the video

Sometimes you only want to linsten the audio while output the video will be a waste of CPU resource and an annoying window. With option -vo null, you will enjoy the audio!
This is sample output - yours may be different.
9

mplayer -vo null something.mpg

foremire · 2010-02-23 16:36:36 18
show where symlinks are pointing

displays the output of ls -l without the rest of the crud. pretty simple but useful.
This is sample output - yours may be different.
2

lsli() { ls -l --color "$@" | awk '{ for(i=9;i<NF;i++){ printf("%s ",$i) } printf("%s\n",$NF) }'; }

quigybo · 2010-02-23 15:05:28 6
Recursively remove .svn directories
This is sample output - yours may be different.
1

find . -name .svn -exec rm -r {} +;

nishan_n · 2010-02-23 10:24:16 4
Recursively remove .svn directories
This is sample output - yours may be different.
-8

ls -RAx | grep "svn:$" | sed -e "s/svn:/svn/" | xargs rm -fr

ook · 2010-02-23 08:42:15 3
Recursively remove .svn directories

Recursively remove .svn directories from the current location.
This is sample output - yours may be different.
-2

rm -rf `find . -name .svn`

jfcalvo · 2010-02-23 08:35:06 6
Burn an ISO on commandline with wodim instead cdrecord
This is sample output - yours may be different.
1

wodim -v speed=4 dev='/dev/scd0' foo.iso

glako · 2010-02-22 21:56:11 3
Convert all .wav to .mp3

Audio convert is a script that uses zenity and lame to transcode virtually any format to any other format provided you have the libraries installed to do so.
This is sample output - yours may be different.
1

audio-convert <dir>/*

din7 · 2010-02-22 17:44:53 3
Convert all .wav to .mp3
This is sample output - yours may be different.
-3

ls *.wav | while read f; do lame "$f" -o "$(echo $f | cut -d'.' -f1)".mp3; done;

glaudiston · 2010-02-22 14:10:39 7
create a temporary file in a command line call

Sometimes you have a script that needs and inputfile for execution. If you don't want to create one because it may contain only one line you can use the ` mysql -uuser -ppass dbname < <(echo "SELECT * FROM database;") This can be very usefull when working with mysql as I showed in the example code above. This will create a temporary file that is used to execute mysql and for example select all entrys from a specific database.
This is sample output - yours may be different.
9

any_script.sh < <(some command)

cb0 · 2010-02-21 18:44:33 27
tail: watch a filelog

-f file(s) to be monitorized -n number of last line to be printed on the screen in this example, the content of two files are displayed
This is sample output - yours may be different.
5

tail -n 50 -f /var/log/apache2/access_log /var/log/apache2/error_log

warlock · 2010-02-21 14:45:44 4
Split a file one piece at a time, when using the split command isn't an option (not enough disk space)

bs = buffer size (basically defined the size of a "unit" used by count and skip) count = the number of buffers to copy (16m * 32 = 1/2 gig) skip = (32 * 2) we are grabbing piece 3...which means 2 have already been written so skip (2 * count) i will edit this later if i can to make this all more understandable
This is sample output - yours may be different.
2

dd if=inputfile of=split3 bs=16m count=32 skip=64

jearsh · 2010-02-21 10:09:46 3
Show the size of a directory

Displays only the subtotal size of a directory with the -s option, and in human readable format. Show Sample Output
This is sample output - yours may be different.
```
blaine@blaine-workstation:~$ du -sh .
11G     .
```
-5

du -sh some/directory

Jacolyte · 2010-02-21 02:08:28 38
Burn an ISO on the command line.
This is sample output - yours may be different.
2

cdrecord -v speed=4 driveropts=burnfree dev=/dev/scd0 cd.iso

Jacolyte · 2010-02-21 00:17:49 3
Extract a IRC like chat log out of an Adium xml logfile
This is sample output - yours may be different.
2

xmlstarlet sel -N x="http://purl.org/net/ulf/ns/0.4-02" -T -t -m "//x:message" -v "concat(substring(@time,12,5),' < ',@sender,'>', ' ',.)" -n

cbrinker · 2010-02-20 01:37:40 4
Find the real procesor speed when you use CPU scaling [cpuspeed]

We don't use CPU scaling, but just in case you do, there is something interesting to note. If you look at the /proc/cpuinfo, the speed listed is current running speed of the processors and not the real speed of the chip. Show Sample Output
This is sample output - yours may be different.
```
Processor (or core) running speed is: 1000.000
Processor (or core) running speed is: 1000.000
Processor (or core) running speed is: 1000.000
Processor (or core) running speed is: 1000.000
Processor (or core) running speed is: 1000.000
Processor (or core) running speed is: 1000.000
Processor (or core) running speed is: 1000.000
Processor (or core) running speed is: 1000.000
Processor real speed is: 2800 MHz
Processor real speed is: 2800 MHz
Processor real speed is: 2800 MHz
Processor real speed is: 2800 MHz
```
2

awk -F": " '/cpu MHz\ */ { print "Processor (or core) running speed is: " $2 }' /proc/cpuinfo ; dmidecode | awk -F": " '/Current Speed/ { print "Processor real speed is: " $2 }'

unixhome · 2010-02-19 21:20:18 238
Restrict the bandwidth for the SCP command

the command is obvious, I know, but maybe not everyone knows that using the parameter "-l" you can limit the use of bandwidth command scp. In this example fetch all files from the directory zutaniddu and I copy them locally using only 10 Kbs
This is sample output - yours may be different.
11

scp -l10 pippo@serverciccio:/home/zutaniddu/* .

0disse0 · 2010-02-19 16:44:24 13
ShadyURL via CLI
This is sample output - yours may be different.
1

SITE="www.google.com"; curl --silent "http://www.shadyurl.com/create.php?myUrl=$SITE&shorten=on" | awk -F\' '/is now/{print $6}'

allrightname · 2010-02-19 14:21:02 6
See your current RAM frequency

man dmidecode [look for type] Show Sample Output
This is sample output - yours may be different.
```
[root@ronfedora ~]# dmidecode -t 17 | awk -F":" '/Speed/ { print $2 }'
 533 MHz
 533 MHz
```
10

dmidecode -t 17 | awk -F":" '/Speed/ { print $2 }'

unixhome · 2010-02-19 12:15:13 13

Reconstruct a malformed authorizated_keys for ssh

when someone mail you his ssh public key, and the lines are broken with '\n', you can reconstruct a new file with one key by line with this command. Show Sample Output

pepin · 2010-02-19 08:32:35 3

See your current RAM frequency

Show Sample Output
This is sample output - yours may be different.
```
gnu@robby:~$ sudo /usr/sbin/dmidecode | grep -i "current speed"
	Current Speed: 2800 MHz
	Current Speed: Unknown
	Current Speed: Unknown
	Current Speed: Unknown
	Current Speed: Unknown
```
4

/usr/sbin/dmidecode | grep -i "current speed"

eastwind · 2010-02-19 07:28:07 5
Cleanly quit KDE4 apps

Quit Kill Restart Plasma whenever it is hung!
This is sample output - yours may be different.
0

kbuildsycoca4 && kquitapp plasma-desktop && kstart plasma-desktop

freethinker · 2010-02-19 06:37:41 3
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Copy text to the clipboard

Great for little scripts that dig up obscure info that you are going to have to paste into another app anyway.

Display rows and columns of random numbers with awk

Displays six rows and five columns of random numbers between 0 and 1. If you need only one column, you can dispense with the "for" loop.

Formatted list - WWNs of all LUNs

Use `scsi_id` to positively identify which LUNs are which (i.e. compare with the list of LUNs you created on your disk array) (shown: RHEL5 usage) Debian usage: $ # for i in /dev/sd* ; do wwn=`/lib/udev/scsi_id -g --device $i` ; [ "$wwn" != "" ] && echo -e ${i##*/}'\t'$wwn ;done

lazy SQL QUERYING

This is regarding the command 8263 using an alias to fill in command line options for psql. You can actually just type 'psql'. In order for that to work, you want to set environment variables PGDATABASE, PGHOST, PGUSER, and (except you're using the default) PGPORT. Also, you can add a line "host:port:dbname:user:password" (asterisk ok in some columns) to your ~/.pgpass file. Finally, if you don't like the aligned columns, you can add the line "\pset format unaligned" to your ~/.psqlrc file.

Fetch the current human population of Earth

They are using json now

list files recursively by size

List all NPM global packages installed

Create the four oauth keys required for a Twitter stream feed

Twitter stream feeds now require authentication. This command is the FIRST in a set of five commands you'll need to get Twitter authorization for your final Twitter command. *** IMPORTANT *** Before you start, you have to get some authorization info for your "app" from Twitter. Carefully follow the instructions below: Go to dev.twitter.com/apps and choose "Create a new application". Fill in the form. You can pick any name for your app. After submitting, click on "Create my access token". Keep the resulting page open, as you'll need information from it below. If you closed the page, or want to get back to it in the future, just go to dev.twitter.com/apps Now customize FIVE THINGS on the command line as follows: 1. Replace the string "Consumer key" by copying & pasting your custom consumer key from the Twitter apps page. 2. Replace the string "Consumer secret" by copying & pasting your consumer secret from the Twitter apps page. 3. Replace the string "Access token" by copying & pasting your access token from the Twitter apps page. 4. Replace string "Access token secret" by copying & pasting your own token secret from the Twitter apps page. 5. Replace the string 19258798 with the Twitter UserID NUMBER (this is **NOT** the normal Twitter NAME of the user you want the tweet feed from. If you don't know the UserID number, head over to www.idfromuser.com and type in the user's regular Twitter name. The site will return their Twitter UserID number to you. 19258798 is the Twitter UserID for commandlinefu, so if you don't change that, you'll receive commandlinefu tweets, uhm... on the commandline :) Congratulations! You're done creating all the keys! Environment variables k1, k2, k3, and k4 now hold the four Twitter keys you will need for your next step. The variables should really have been named better, e.g. "Consumer_key", but in later commands the 256-character limit forced me to use short, unclear names here. Just remember k stands for "key". Again, remember, you can always review your requested Twitter keys at dev.twitter.com/apps. Our command line also creates four additional environment variables that are needed in the oauth process: "once", "ts", "hmac" and "id". "once" is a random number used only once that is part of the oauth procedure. HMAC is the actual key that will be used later for signing the base string. "ts" is a timestamp in the Posix time format. The last variable (id) is the user id number of the Twitter user you want to get feeds from. Note that id is ***NOT*** the twitter name, if you didn't know that, see www.idfromuser.com If you want to learn more about oauth authentication, visit oauth.net and/or go to dev.twitter.com/apps, click on any of your apps and then click on "Oauth tool" Now go look at my next command, i.e. step2, to see what happens next to these eight variables.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Extract rpm package name, version and release using some fancy sed regex

This command could seem pretty pointless especially when you can get the same result more easily using the rpm builtin queryformat, like: $ rpm -qa --qf "%{NAME} %{VERSION} %{RELEASE}.%{ARCH}\n" | sort | column -t but nonetheless I've learned that sometimes it can be quite interesting trying to explore alternative ways to accomplish the same task (as Perl folks like to say: There's more than one way to do it!)

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