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Humpty Numpty sat at the mall.

Humpty Numpty was at the mess hall.

All Burger King's PR and Burger King's men,

Couldn't feed Humpty a Burger again.

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Copy the child repo to your /tmp (Or into another ramdisk, should be faster)

cd into the new repo.

Now lets rewirte stuff.

Move into subdirectory (here called "report"):

git filter-branch --index-filter \

'git ls-files -s | sed "s-$(printf '''\t''')"*-&report/-" |

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Are there any historical reasons for there being two commands instead of one?

There was just history manner.

Bill Joy wrote the first version of printenv command in 1979 for BSD.
UNIX System III introduced env command in 1980.
GNU followed UNIX System's env in 1986.
BSD followed GNU/UNIX System's env in 1988.
MINIX followed BSD's printenv in 1988.
GNU followed MINX/BSD's printenv in 1989.

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Find the dependent child images on Docker

When you try to remove the docker image with the following command

docker rmi 6795374be8c1

Sometimes you might be facing below error:

Error response from daemon: conflict: unable to delete 6795374be8c1 (cannot be forced) - image has dependent child images

Below is the Docker command line used to find the dependent child images

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Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

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# first set up a pipe named "2" with bandwidth 
# limited to 16kbit/s and latency of 100ms
sudo ipfw pipe 2 config bw 16Kbit/s delay 100ms

# next add rule #1 using the pipe we set up, configured to 
# act only on local tcp traffic going to port 27019
sudo ipfw add 1 pipe 2 tcp from me to me 27019 out

# now you should be observing slow ping times for
# mongod on 27019

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_complete_ssh_hosts ()
{
        COMPREPLY=()
        cur="${COMP_WORDS[COMP_CWORD]}"
        comp_ssh_hosts=`cat ~/.ssh/known_hosts | \
                        cut -f 1 -d ' ' | \
                        sed -e s/,.*//g | \
                        grep -v ^# | \
                        uniq | \
                        grep -v "\[" ;

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"""
ec2_tags - Exports all EC2 tags in a 'tags' grain

For Salt (http://saltstack.org)

Author: Emil Stenqvist <emsten@gmail.com>

Usage:

1. Put ec2_tags.py in roots/_grains/

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{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "AWS CloudFormation Template (SNIPPET) that maps Amazon NAT amis (amzn-ami-vpc-nat) for each region and architecture.  These instances should have the NAT configured by /usr/local/sbin/configure-pat.sh, which enables IP forwarding and adds masquerading to iptables.  IMPORTANT, when defining your EC2 instance as a NAT, make sure the 'SourceDestCheck': property is set to false.  Otherwise, traffic through the NAT may not work.  This setting allows the NAT to forward network traffic - it is not the recipient of the traffic.",
    "Mappings": {
        "AWSInstanceType2Arch": {
            "t1.micro": {
                "Arch": "PV64"
            },
            "t2.micro": {
                "Arch": "HVM64"

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"Briefly stated, the Gell-Mann Amnesia effect is as follows. You open the newspaper to an article on some subject you know well. In Murray's case, physics. In mine, show business. You read the article and see the journalist has absolutely no understanding of either the facts or the issues. Often, the article is so wrong it actually presents the story backward—reversing cause and effect. I call these the "wet streets cause rain" stories. Paper's full of them. In any case, you read with exasperation or amusement the multiple errors in a story, and then turn the page to national or international affairs, and read as if the rest of the newspaper was somehow more accurate about Palestine than the baloney you just read. You turn the page, and forget what you know." -Michael Crichton