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displays a reminder message at the specified time
This is sample output - yours may be different.
-1

echo "DISPLAY=$DISPLAY xmessage convert db to innodb" | at 00:00

op4 · 2010-02-04 04:02:35 4
Get an authorization code from Google

This is a basis for other Google API commands.
This is sample output - yours may be different.
2

curl -s https://www.google.com/accounts/ClientLogin -d Email=$email -d Passwd=$password -d service=lh2 | grep Auth | sed 's/Auth=$.*$/\1/'

matthewbauer · 2010-02-04 03:34:54 7
Poor man's unsort (randomize lines)

If you need to randomize the lines in a file, but have an old sort commands that doesn't support the -R option, this could be helpful. It's easy enough to remember so that you can create it as a script and use that. It ain't real fast. It ain't safe. It ain't super random. Do not use it on untrusted data. It requires bash for the $RANDOM variable to work. Show Sample Output
This is sample output - yours may be different.
```
$ echo -e a\\nb\\nc | while read l; do echo $RANDOM "$l"; done | sort -n | cut -d " " -f 2-
c
a
b
```
0

while read l; do echo $RANDOM "$l"; done | sort -n | cut -d " " -f 2-

ketil · 2010-02-03 22:36:34 4
Perl Command Line Interpreter

My Programming Languages professor assigned my class a homework assignment where we had to write a Perl interpreter using Perl. I really like Python's interactive command line interpreter which inspired this Perl script.
This is sample output - yours may be different.
10

perl -e 'while(1){print"> ";eval<>}'

kzh · 2010-02-03 21:48:33 390
copy partition table from /dev/sda to /dev/sdb
This is sample output - yours may be different.
1

sfdisk -d /dev/sda | sfdisk /dev/sdb

wincus · 2010-02-03 14:49:07 4
Display the space used for all your mounted logical volume (LV)
This is sample output - yours may be different.
0

df -kh /dev/vg0*/lv*

marousan · 2010-02-03 13:37:30 4
Fix the vi zsh bindings on ubuntu

Use sed to comment out any up/down bindings in zsh
This is sample output - yours may be different.
1

sudo sed -iorig '/$up\|down$/s/^/#/' /etc/zsh/zshrc

cbrinker · 2010-02-02 23:17:08 27
Unlock and access an ssh key keychain entry from CLI

This must be run the first time while logged into your Mac desktop, as it will graphically prompt for access permissions. Subsequent uses will not prompt, assuming you select "Always allow". Show Sample Output
This is sample output - yours may be different.
```
password to unlock default: 
password: "s3kr3tp@ssw0rd!#%"
```
-1

security unlock-keychain; security find-generic-password -ga "/Users/mruser/.ssh/id_dsa" 2>&1 > /dev/null

curiousstranger · 2010-02-02 21:14:57 3
Get current Xorg resolution via xrandr
This is sample output - yours may be different.
1

$ xrandr -q|perl -F'\s|,' -lane "/^Sc/&&print join '',@F[8..10]"

monkeyvegas · 2010-02-02 19:37:53 4

Dump a web page

Useful to browse dangerous web sites. Show Sample Output

curl -s http://google.com | hexdump -C|less

chilicuil · 2010-02-02 18:54:49 4

Get current Xorg resolution via xrandr
This is sample output - yours may be different.
0

xrandr -q | awk -F'current' -F',' 'NR==1 {gsub("( |current)","");print $2}'

sputnick · 2010-02-02 16:26:17 6
Get current connected wireless network with nm-tools

Gets only when the state is connected.
This is sample output - yours may be different.
0

nm-tool 2>/dev/null|sed -n '/Type:[ ]*802.11 WiFi/,/IPv4 Settings/{ /State:[ ]*connected/,/IPv4 Settings/{ s/^[ ]*//;/^\*.*Infra/ { s/^*//;s/:.*//;p }}}'

chmouel · 2010-02-02 12:04:12 3
Get current Xorg resolution via xrandr

To show your current resolution on your desktop Show Sample Output
This is sample output - yours may be different.
```
2960x1050
```
0

xrandr -q|sed -n 's/.*current[ ]$[0-9]*$ x $[0-9]*$,.*/\1x\2/p'

chmouel · 2010-02-02 10:00:31 4
Make ISO image of a folder

Create ISO image of a folder in Linux. You can assign label to ISO image and mount correctly with -allow-lowercase option.
This is sample output - yours may be different.
14

mkisofs -J -allow-lowercase -R -V "OpenCD8806" -iso-level 4 -o OpenCD.iso ~/OpenCD

alamati · 2010-02-02 05:24:18 63
Python Challenge Problem 0

This is the answer to the 0th problem from the python challenge < http://www.pythonchallenge.com/ >. Replace sensible-browser with firefox, w3m or whatever. Show Sample Output
This is sample output - yours may be different.
```
http://www.pythonchallenge.com/pc/def/map.html
```
-1

sensible-browser http://www.pythonchallenge.com/pc/def/$(bc <<< 2^38).html

kzh · 2010-02-02 00:53:18 8
Vlc ncurses mode browsing local directorys.
This is sample output - yours may be different.
2

vlc -I ncurses <MEDIA_DIR>

sputnick · 2010-02-01 22:47:54 4
Recursively replace a string in files with lines matching string

Changed out the for loop for an xargs. It's a tad shorter, and a tad cleaner.
This is sample output - yours may be different.
0

find . -type f |xargs -I% sed -i '/group name/s/>/ deleteMissing="true">/' %

4fthawaiian · 2010-02-01 21:09:57 3
Remove branches that no longer exist from being shown via 'git branch -a'

If you rebase and delete a lot of remote branches via git, your list of branches will end up showing branches on origin that no longer exist. This command will clear them out. Show Sample Output
This is sample output - yours may be different.
```
Pruning origin
URL: git@github.com:app/signup.git
 * [pruned] origin/1099_feature1
 * [pruned] origin/2562_feature2
 * [pruned] origin/2576_feature3
 * [pruned] origin/2576_feature4
 * [pruned] origin/2591_feature5
```
0

git remote prune origin

donnoman · 2010-02-01 18:45:51 5
Recursively replace a string in files with lines matching string

Recursively replace a string in files with lines matching string. Lines with the string "group name" will have the first > character replaced while other > characters on other lines will be ignored. Show Sample Output
This is sample output - yours may be different.
```
Before:  <group name="HTTP Service Group" type="compat" resourceType="HTTP">
    <resourceType name="HTTP">
      <resource name="regex:^.*SERVERGROUP[^D]$"/>
    </resourceType>
  </group>

After:  <group name="HTTP Service Group - SERVERGROUP" type="compat" resourceType="HTTP" deleteMissing="true">
    <resourceType name="HTTP">
      <resource name="regex:^.*SERVERGROUP[^D]$"/>
    </resourceType>
  </group>
```
0

for i in `find . -type f`; do sed -i '/group name/s/>/ deleteMissing="true">/' $i; done

allrightname · 2010-02-01 17:16:37 3
Pretty Print a simple csv in the command line

Will handle pretty much all types of CSV Files. The ^M character is typed on the command line using Ctrl-V Ctrl-M and can be replaced with any character that does not appear inside the CSV. Tips for simpler CSV files: * If newlines are not placed within a csv cell then you can replace `map(repr, r)` with r Show Sample Output
This is sample output - yours may be different.
```
'Date'        'info'    'name'              'amount'
'3/4/2009'    'abc123'  'Momo, Chika'       '1,000.00'
'9/14/2008'   'abc123'  'Kilo, Bamya'       '500'
'2/21/2009'   'abc123'  'Abeer, Bilhaj'     '10,000'
'5/9/2008'    'abc123'  'Adel, Ayoob'       '100'
'10/10/2008'  'abc123'  'Merabet, Jinkins'  ''
'10/13/2008'  'abc123'  'tito, micheal'     '50'
```
1

python -c 'import sys,csv; c = csv.reader(sys.stdin); [sys.stdout.write("^M".join(map(repr,r))+"\n") for r in c];' <tmp/test.csv | column -s '^M' -t

pykler · 2010-02-01 14:57:25 7
Define words with google. (busybox version)

This is a minimalistic version of the ubiquitious Google definition screen scraper. This version was designed not only to run fast, but to work using BusyBox. BusyBox is a collection of basic Unix tools that have been compiled into a single binary to save space on tiny installations of Unix. For example, although my phone doesn't have perl or the GNU utilities, it does have BusyBox's stripped down versions of wget, tr, and sed. It turns out that those tools suffice for many tasks. Known Bugs: This script does not handle HTML entities at all. I don't think there's an easy way to do that within BusyBox, but I'd love to see it if someone could do it. Also, this script can only define a single word, not phrases. (Well, you could if you typed in %20, but that'd be gross.) Lastly, this script does not show the URL where definitions were found. Given the randomness of the Net, that last bit of information is often key. Show Sample Output
This is sample output - yours may be different.
```
$ def lek
A communal courtship arena which is used by several males to try to attract a female for mating.
```
0

wget -q -U busybox -O- "http://www.google.com/search?ie=UTF8&q=define%3A$1" | tr '<' '\n' | sed -n 's/^li>$.*$/\1\n/p'

hackerb9 · 2010-02-01 13:01:47 9
convert permissions in ls to octal
This is sample output - yours may be different.
-4

ls -l | sed -e 's/--x/1/g' -e 's/-w-/2/g' -e 's/-wx/3/g' -e 's/r--/4/g' -e 's/r-x/5/g' -e 's/rw-/6/g' -e 's/rwx/7/g' -e 's/---/0/g'

luishka · 2010-01-31 22:41:02 16
find large files

simple find -> xargs sort of thing that I get a lot of use out of. Helps find huge files and gives an example of how to use xargs to deal with them. Tested on OSX snow leopard (10.6). Enjoy. Show Sample Output
This is sample output - yours may be different.
```
1.1G    ./Downloads/huge_avi.avi
1.2G    ./Downloads/another_huge_avi.avi
```
1

find . -type f -size +1100000k |xargs -I% du -sh %

4fthawaiian · 2010-01-31 22:04:07 8
Validating a file with checksum
This is sample output - yours may be different.
1

echo 'c84fa6b830e38ee8a551df61172d53d7 myfile' | md5sum -c

xakon · 2010-01-31 21:07:32 6
ptree equivalent in HP-UX

By setting the UNIX95 variable in HP-UX the XPG4 mode is activated, you get new options for ps and other commands, for me the best way to use this is to create an alias named ptree in root profile: alias ptree='UNIX95=1 ps -eH'
This is sample output - yours may be different.
1

UNIX95=1 ps -eHf

jreypo · 2010-01-31 20:44:46 5
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Show drive names next to their full serial number (and disk info)

Scrap everything and use `gawk` to do all the magic, since it's like the future or something. $ gawk 'match($11, /[a-z]{3}$/) && match($9, /^ata-/) { gsub("../", ""); print $11,"\t",$9 }' Yank out only ata- lines that have a drive letter (ignore lines with partitions). Then strip ../../ and print the output. Yay awk. Be sure to see the alternatives as my initial command is listed there. This one is a revision of the original.

Use wget to download one page and all it's requisites for offline viewing

check open ports without netstat or lsof

Find dead symbolic links

Download all Red Hat Manuals - A better way by user Flatcap

Let's give Flatcap credit for this elegant solution, instead of leaving it hidden as a comment. Tested on RHEL6 and it works. Nice and clean.

tar.gz with gpg-encryption on the fly

Create a encrypted tar.gz file from a directory on the fly. The encryption is done by GPG with a public key. The resulting filename is tagged with the date of creation. Very usefull for encrypted snapshots of folders.

Run a command when a file is changed

Display a block of text: multi-line grep with perl

-n reads input, line by line, in a loop sending to $_ Equivalent to while () { mycode } -e execute the following quoted string (i.e. do the following on the same line as the perl command) the elipses .. operator behaves like a range, remembering the state from line to line.

concatenate avi files

concatenates avi files

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

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