dan.thoughts

Snippet (found on net) for removing files from repository that are no longer present under your project.

$ git rm $(git ls-files -d)

For best use add it to bash alias file: ~/.bashrc or ~/.bash-aliases (under ubuntu):

alias gitclean='git rm $(git ls-files -d)'

Here is the bash shell script that makes archived dumps of your database server. All databases are separated from each other and stored into date based folders.

#!/bin/bash

MyUSER="root"
MyPASS=""
MyHOST="localhost"
NOW="$(date +"%d-%m-%Y")"
STOREDIR="/home/storage/backup/database/by_dates/$NOW"
DBLIST="$(mysql -u $MyUSER -h $MyHOST -Bse 'show databases')"

[ ! -d $STOREDIR ] && mkdir -p $STOREDIR || :

for db in $DBLIST
do
	FILE="$STOREDIR/$db.gz"
	mysqldump -u $MyUSER -h $MyHOST $db | gzip -9 > $FILE
done

First, we need to install all dependencies:

# yum install gettext-devel expat-devel curl-devel zlib-devel openssl-devel

Next, get the git 1.6.x sources:

# wget http://kernel.org/pub/software/scm/git/git-1.6.3.3.tar.gz

Then, unpack and cd into git sources folder and install it:

# make && make install & make clean

That`s it, now you`ll have git system ready to go.

For example, in your bash shell script you`re going to use some root-specific commands like network operations, mounting devices and so on. There are couple easy ways to check if your script is executing under root privileges.

#!/bin/bash
# ...
if [ "$(id -u)" != "0" ]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi
# ...

Another way: use EUID. When user account created a user ID is assigned to each user. Bash shell stores the user ID in $UID variable. Your effective user ID is stored in $EUID variable.

#!/bin/bash
# ...
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi
# ...