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Save xkcd to a pdf with captions

Saves to a PDF with title and alt text of comic. As asked for on http://bbs.archlinux.org/viewtopic.php?id=91100 Change xkcd.com to dynamic.xkcd.com/comics/random for a random comic.
This is sample output - yours may be different.
6

curl -sL xkcd.com | grep '<img [^>]*/><br/>' | sed -r 's|<img src="(.*)" title="(.*)" alt="(.*)" /><br/>|\1\t\2\t\3|' > /tmp/a; curl -s $(cat /tmp/a | cut -f1) | convert - -gravity south -draw "text 0,0 \"$(cat /tmp/a | cut -f2)\"" pdf:- > xkcd.pdf

matthewbauer · 2010-03-03 03:41:31 14
Show the 1000*1000 and 1024*1024 size of HDs on system
This is sample output - yours may be different.
1

awk '/d[a-z]+$/{print $4}' /proc/partitions | xargs -i sudo hdparm -I /dev/{} | grep 'device size with M'

rthemocap · 2010-03-02 20:06:03 5
Show the 1000*1000 and 1024*1024 size of HDs on system

I know this sucks in some way but if someone can improve it please be my guest Show Sample Output
This is sample output - yours may be different.
```
        device size with M = 1024*1024:       38166 MBytes
        device size with M = 1000*1000:       40020 MBytes (40 GB)
        device size with M = 1024*1024:       58627 MBytes
        device size with M = 1000*1000:       61475 MBytes (61 GB)
        device size with M = 1024*1024:      238475 MBytes
        device size with M = 1000*1000:      250059 MBytes (250 GB)
```
0

for I in $(awk '/d[a-z]+$/{print $4}' /proc/partitions); do sudo hdparm -I '/dev/'$I; done | grep 'device size with M'

ElAlecs · 2010-03-02 18:56:32 5
simple backup with rsync

With this cron, rsync begins to sinchronize the contents of the local directory on /[VIPdirectory] with the directory /backup/[VIPdirectory] on the remote server X.X.X.X. Previously we need working on public/private-keys ssh to guarantee the acces to the remote server on X.X.X.X Show Sample Output
This is sample output - yours may be different.
```
no output
```
5

0 10 * * * rsync -rau /[VIPdirectory] X.X.X.X:/backup/[VIPdirectory]

mack · 2010-03-02 17:48:54 3
split and combine different pages from different pdf's

The command shows the real power of the pdftk tool, you can do basically everything you want with multiple pdf's. In the command a book is created from chapters, headings and covers.
This is sample output - yours may be different.
7

pdftk A=chapters.pdf B=headings.pdf C=covers.pdf cat C1 B1 A1-7 B2 A8-10 C2 output book.pdf

bw · 2010-03-02 16:04:50 9
Netcat & Tar

Create a tarball on the client and send it across the network with netcat on port 1234 where its extracted on the server in the current directory.
This is sample output - yours may be different.
2

Server: nc -l 1234 |tar xvfpz - ;Client: tar zcfp - /path/to/dir | nc localhost 1234

unixmonkey8504 · 2010-03-02 14:24:04 3
Read directory contents recursively

Read all contents from current directory and display to stdout.
This is sample output - yours may be different.
-6

while read f;do echo "$f";done < <(find .)

unixmonkey8504 · 2010-03-02 14:22:22 3
Read directory contents recursively

Read all contents from current directory and display it on stdout.
This is sample output - yours may be different.
-8

find . |while read f;do echo "$f";done

unixmonkey8504 · 2010-03-02 14:21:15 7
perl find and replace
This is sample output - yours may be different.
-1

find -name ".php" -exec perl -pi -e 's/search/replace/g/' {} \;

unixmonkey8504 · 2010-03-02 14:18:44 3
Find all files and append to file

find all files in cur dir add to url and append to file
This is sample output - yours may be different.
-2

find . type f -exec echo http://exg.com/{} \; > file

unixmonkey8504 · 2010-03-02 14:18:01 3
Create & transfer tarball over ssh

Create tarball on stdout which is piped to tar reading from stdin all over ssh
This is sample output - yours may be different.
0

ssh -c 'tar cvzf - -C /path/to/src/*' | tar xzf -

unixmonkey8504 · 2010-03-02 14:15:17 3
Move itens from subdirectories to current directory

You WILL have problems if the files have the same name. Use cases: consolidate music library and unify photos (especially if your camera separates images by dates). After running the command and verifying if there was no name issues, you can use ls -d */ | sed -e 's/^/\"/g' -e 's/$/\"/g' | xargs rm -r to remove now empty subdirectories.
This is sample output - yours may be different.
-1

ls -d */* | sed -e 's/^/\"/g' -e 's/$/\"/g' | xargs mv -t $(pwd)

leovailati · 2010-03-01 23:43:26 6
finds all files in dir and replaces
This is sample output - yours may be different.
-2

find . -type f -exec sed -i 's/gw10./gw17./g' {} \;

m03hr3 · 2010-03-01 21:40:54 3
Play music from youtube without download

same as above but dumps the stream to a file.
This is sample output - yours may be different.
3

url="$my_url";file=$(youtube-dl -s -e $url);wget -q -O - `youtube-dl -b -g $url`| ffmpeg -i - -f mp3 -vn -acodec libmp3lame - > "$file.mp3"

unixmonkey8504 · 2010-03-01 21:26:13 4
Download free e-books

Mask the user agent as firefox, recursively download 2 levels deep from a span host with a maximum of 1 redirection, use random wait time and dump all pdf files to myBooksFolder without creating any other directories. Host will have no way of knowing that this is a grabber script.
This is sample output - yours may be different.
8

wget -erobots=off --user-agent="Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.3) Gecko/2008092416 Firefox/3.0.3" -H -r -l2 --max-redirect=1 -w 5 --random-wait -PmyBooksFolder -nd --no-parent -A.pdf http://URL

unixmonkey8504 · 2010-03-01 20:22:44 27
Parse bookmarks and download youtube files

Parses your exported bookmarks to generate a clean list of http lines and passes it on to clive to try to download the video file from various sites.
This is sample output - yours may be different.
0

sed 's+href="$[^"]*$"+\n\1\n+g' bookmarks.html | grep '^http' |clive

unixmonkey8504 · 2010-03-01 20:17:22 3
Get all mac address

I prefer the ip command to ifconfig as ifconfig is supposedly going to be deprecated. Certain IP address aliases can only be seen with the ip command (such as the ones applied by RHCS).
This is sample output - yours may be different.
6

ip link show

d34dh0r53 · 2010-03-01 20:10:27 4
Recursively remove .svn directories
This is sample output - yours may be different.
4

find . -type d -name .svn -delete

jmcantrell · 2010-03-01 18:48:31 7

get the result of database query in vertical way (Column=Value)

the database client sqlplus generate results one line per row. This function convert the sqlplus output to show the result vertically, in layout: Column_name=[Column_Value]. Very usefull for scripts. Show Sample Output

vsqlplus "SELECT * FROM TABLE_NAME;"

glaudiston · 2010-03-01 17:11:07 5

grep tab chars

mixing tabs and spaces for indentation in python would confuse the python interpreter, to avoid that, check if the file has any tab based indentation. "^V" => denotes press control + v and press tab within quotes. cat improper_indent.py class Tux(object): print "Hello world.." grep " " improper_indent.py print "Hello world.."
This is sample output - yours may be different.
9

grep "^V<TAB>" your_file

sathyz · 2010-03-01 08:46:02 15
Lists installed kernels

no need for rpm, no need for piping to another command. also no real fu but lacking in unnecessary complexity and distro specific commands.
This is sample output - yours may be different.
6

ls -1 /lib/modules

TheMightyBuzzard · 2010-03-01 06:30:12 8
Lists installed kernels

Exploit that RPM database just sitting there, taking up space. Show Sample Output
This is sample output - yours may be different.
```
$ rpm -qf /lib/modules/*          
kernel-2.6.31.12-174.2.19.fc12.x86_64
kernel-2.6.31.12-174.2.22.fc12.x86_64
```
-5

rpm -qf /lib/modules/*

megacoder · 2010-03-01 05:00:56 3
floating point operations in shell scripts

a simple trick to do floating point operations in shell, use awk. You can evaluate any complicated expressions which can be evaluated in C. Show Sample Output
This is sample output - yours may be different.
```
echo $val  #2.85714
```
0

exp="(2+3.0)/7.0*2^2"; val=$(awk "BEGIN {print $exp}" /dev/null)

JeffChen · 2010-03-01 02:47:22 3
Download all files under http://codeigniter.com/user_guide/ to the current directory

I constantly need to work on my local computer, thus I need a way to download the codeigniter user guide, this is the wget way I figured.
This is sample output - yours may be different.
-2

wget -r --no-parent http://codeigniter.com/user_guide/ ; mv codeigniter.com/user_guide/* . ; rm -rf codeigniter.com

jimthunderbird · 2010-03-01 02:37:26 3
Display which distro is installed

This should work on any RPM-based distribution. It's more reliable than trying to parse the content of the files. Show Sample Output
This is sample output - yours may be different.
```
$ rpm -qf /etc/*-release
fedora-release-12-2.noarch
fedora-release-12-2.noarch
fedora-release-12-2.noarch
```
-11

rpm -qf /etc/*-release

megacoder · 2010-03-01 01:24:07 3
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Format ps command output

ps command gives the possibility to display information with custom formatting with the -o options followed by the format specifier list.

recursive base64 encoding -- Cipher for the Poor ?

Just for fun, I searched a simple way to encrypt some text. Simple base64 encoding seemed a good start so I decided to "amplify" encoding using repeted base64 encoding. Of course, this is not really secure but can be useful to hide datas to most part of humans ;). Do not hesitate to provide better solutions or else.

Create sqlite db and store image

Creates a simple sqlite db (img.db) inserts /tmp/Q.jpg on base64 an recorvers it as /tmp/W.jpg

Batch rename extension of all files in a folder, in the example from .txt to .md

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

a simple bash one-liner to create php file and call php function

Picture Renamer

jhead is a very nice tool to do all sorts of things with photographs, in a batch-oriented way. It has a specific function to rename files based on dates, and the format I used above was just an example.

Change the window title of your xterm

If you are using an xterm emulation capable terminal emulator, such as PuTTY or xterm on Linux desktop, this command will replace the title of that terminal window. I know it is not nice to have seventeen terminals on your desktop with title PuTTY, you can not tell which one is connected to which server and doing what. Even though the string between the quotes is typed as literals, it needs a little more finesse to make it work. Here is how it is done key-by-key: echo "( ctrl-v then ctrl-[ )0;Enter_Title_String_Here( ctrl-v then ctrl-g )"( enter ) ctrl-v : means hold down ctrl key and hit v at the same time like you are pasting in windoze ; also please don't type the parentheses, i.e., ( and )

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 PNG to GIF

(relies on 'imagemagick') Convert all .png files to .gif. This can also go the other way if you reverse the file extensions in the command, e.g.: $ for file in *.gif; do convert "$file" "$(basename $file .gif).png"; done If the file is named 'example1.png' it will be named 'example1.gif' when it is complete.

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