So, I have a few dockers. Every now and then I want to run some command on all of them. Doing ‘docker exec’ is tiresome. I found this neat solution with ansible that I thought I should share with you.
To get started, you need to have the “docker.py” script. This script will be used as python script inventory for ansible. So, use the following command and get the script:
Continue readingJust in case, you are looking for backing up your trello account boards, you can use the following bash script to do so:
#!/bin/bash -
#===============================================================================
#
# FILE: backup-trello.sh
#
# USAGE: ./backup-trello.sh
#
# DESCRIPTION:
#
# OPTIONS: ---
# REQUIREMENTS: ---
# BUGS: ---
# NOTES: ---
# AUTHOR: Amit Agarwal (aka)
# ORGANIZATION: Mobileum
# Last modified: Thu Dec 22, 2016 01:14PM
# CREATED: 08/12/2016 09:41:08 AM IST
# REVISION: $Revision: 1.0 $$
#===============================================================================
# Your backup directory
BDIR=/backup
# Your trello api token and key goes here :)
token=<>
key=<>
# IDs of the boards go here. This is easy to get, just go to your
# board and check the last part of URL
BOARDS=( a b )
URL="https://trello.com/b/"
POST='&actions=all&actions_limit=1000&cards=all&lists=all&members=all&member_fields=all&checklists=all&fields=all'
for i in ${BOARDS[*]}
do
/usr/bin/curl -H 'Accept-Encoding:gzip, deflate, br' -H 'Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' "$URL$i.json?&key=$key&token=$token$POST" > "$BDIR/$i.json.gz"
# gzip -f "$BDIR/$i.json"
done
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If you are doing some scripting and using ‘time’ command, then you know sometimes it becomes difficult to capture the output as the output would be something like this:
: amit ; time ls real 0m0.002s user 0m0.000s sys 0m0.001s
So, it is better to change that format. Here is simple example:
|
1
|
Some times I need random string, for example to use as email seperator or to use in some API. One way is to use tools like /dev/[u]random or od and other such. But they seem cubersome after I figured this out.
openssl rand <length> openssl rand 10
This alone without some parameters is not interesting thoug. You can use ‘-base64’ or ‘-hex’ to select the encoding.
So if you execute the above you will get something like this
Continue readingIn shell scripts if you need to get you local IP address corresponding to your hostname then you can use this command
hostname -i
Here is the script:
#!/bin/bash -
#===============================================================================
#
# FILE: imgOrg.sh
#
# USAGE: ./imgOrg.sh
#
# DESCRIPTION:
#
# OPTIONS: ---
# REQUIREMENTS: ---
# BUGS: ---
# NOTES: ---
# AUTHOR: Amit Agarwal (aka)
# REVISION: ---
#===============================================================================
for i in *
do
if [[ $(file $i) == *image* ]]
then
echo "Image file is :: $i"
dir=$( exiftool -s -DateTimeOriginal $i | awk -F':' '{print $2"/"$3}')
mkdir -p $dir
cp $i $dir/
else
echo "Excluding $i"
fi
done
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So, lets say you have downloaded the SHA256SUMS files. This file contains the sha256sum for multiple files and you want to compare the values for only one or some of them, then the simplest thing you can do is:
sha256sum -c SHA256SUMS
Now, with this if you do not have some files present then you might get some errors and if you do not want that, then you can try this:
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