Tikejhya: Ashish Nepal

Knowledgebase

Month: September 2013

amazon s3

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On 20th September 2013

In amazon

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This is simple guide on howto, install and mount s3 into your server.

yum install gcc libstdc++-devel gcc-c++ curl-devel libxml2-devel openssl-devel mailcap make svn

cd /usr/local/src

wget http://sourceforge.net/projects/fuse/files/fuse-2.X/2.9.1/fuse-2.9.1.tar.gz
tar -xzvf fuse-2.9.1.tar.gz

cd fuse-2.9.1 && ./configure --prefix=/usr && make && make install
ldconfig && export PKG_CONFIG_PATH=/usr/lib/pkgconfig:/usr/lib64/pkgconfig/

modprobe fuse
cd /usr/local/src
svn checkout http://s3fs.googlecode.com/svn/trunk/ s3fs
cd s3fs
autoreconf --install && ./configure --prefix=/usr && make && make install
ldconfig

vi /etc/passwd-s3fs
my-s3-bucket:AccessKeyId:SecretAccessKey
chmod 600 /etc/passwd-s3fs

[create Bucket ¬ [i prefer creating seperate user] ¬ create group and assign policy ¬ ]

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what is Amazon Resource Name (ARN)?
Check summary of Group.

What is Principal?
Check summary of User.

mkdir -p /aws
s3fs -o allow_other -o use_cache=/tmp mybucket /aws -odefault_acl=public-read

# Check if its mounted or not
mount

df -h
df: `/aws’: Transport endpoint is not connected

If this is behind firewall you will need to open port 80/443 [depending upon what you want to use.]
If not try
fusermount -u /aws

and mount again
fusermount -u /aws
s3fs -o allow_other -o use_cache=/tmp mybucket /aws -odefault_acl=private

###
## fstab (for boot time)
s3fs#bucketname /mountpath fuse use_cache=/tmp,allow_other,uid=user,gid=group 0 0

NOTE, fuse doesnot support dir, and file modes

0

change ownership recursively

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On 20th September 2013

In BASH

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find dir -type f -exec chmod 644 {} ‘;’ # make all files rw-r-r-
To change permissions bits of all directories:

find dir -type d -exec chmod 755 {} ‘;’ # make all directories rwxr-xr-x
It would be nice if you could just do this:

0

sticky bit linux

By

On 20th September 2013

In Linux

sticky bit

e.g you want to create a directory called /web
and owned by lighttpd and you want it to be written by lighttpd even if its touched by some other user.

chown -R lighttpd. /web
chown -R lighttpd. *
chmod 775 * -R
chmod +t * -R
chmod u+s,g+s * -R

0

Bash script to recursively add a file folder inside directory

By

On 20th September 2013

In BASH, Scripts

This is just a sample script which will allow you to create directories inside directory for depth of 3 folders, with a file in each folder in 3rd directory.

ie.
1/2/3
3/4/3 …. and so on.

#!/bin/bash
cd dir
for ((i=0;i<=9;i+=1)); do mkdir -p $i cd $i; touch index.html for ((j=0;j<=9;j+=1)); do mkdir -p $j cd $j; touch index.html for ((k=0;k<=9;k+=1)); do mkdir -p $k; touch index.html done cd ../ done cd ../ done

Taking off one level off, which creats only 2 level

#!/bin/bash
cd dir
for ((i=0;i<=9;i+=1)); do mkdir -p $i cd $i; touch index.html for ((j=0;j<=9;j+=1)); do mkdir -p $j; touch index.html done cd ../ done

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