Catalog of Debian maintenance tasks.

debian-maintenance

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# Catalog of common tasks.
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#
# Update packages.
#
apt-get update;apt-get upgrade


#
# Clear swap.
#
swapoff `cat /proc/swaps | awk '{ORS=" ";if($0 ~ /^\/dev\//) print($1)}'`;swapon `cat /proc/swaps | awk '{ORS=" ";if($0 ~ /^\/dev\//) print($1)}'` 


#
# Add user to a group.
#
usermod -a -G group user


#
# Append a time stamp to a file.
#
cp -i $SOURCE_FILE $SOURCE_FILE.`date +'%Y%m%d-%H%M%S'`


#
# Flush deferred mail from the mail queue.
#
postfix flush


#
# Delete all messages from the postfix mail queue.
*
postsuper -d ALL


#
# Set up SSH keys.
#
#Create public and private keys on local host:
user@local:~$ ssh-keygen

#If it doesn't already exist, create authorized host file on remote host:
user@remote:~$ mkdir .ssh && chmod 700 .ssh && touch .ssh/authorized_keys && chmod 600 .ssh/authorized_keys

#Copy public key to remove host:
user@local:~$ cat ~/.ssh/id_rsa.pub | ssh user@remote.com 'cat - >> ~/.ssh/authorized_keys'