#!/usr/bin/env bash
# Bash history tuning
add_to_bashrc(){
if [ -f $1 ]; then
sed -i 's/HISTSIZE=.*/HISTSIZE=100000/' $1
sed -i 's/HISTFILESIZE=.*/HISTFILESIZE=5000000/' $1
cat <<EOF >> $1
shopt -s cmdhist
shopt -s histappend
HISTTIMEFORMAT='%F %T '
if ! [ -z \$PROMPT_COMMAND ]; then
PROMPT_COMMAND='\$PROMPT_COMMAND; history -a';
else
PROMPT_COMMAND='history -a';
fi
EOF
fi
}
for Home in $(ls -1 /home/); do
add_to_bashrc "/home/$Home/.bashrc"
done
add_to_bashrc "/root/.bashrc"
cat <<EOF > /etc/cron.daily/bash_history_backup
#!/usr/bin/env bash
CopyHist(){
if [ -f .bash_history ]; then
cp -p .bash_history .bash_history_backup_last
cp -p .bash_history_backup_last .bash_history_backup_\$(date +%F__%T)
fi
}
for Home in \$(ls -1 /home/); do
cd /home/\$Home || continue
cmp -s .bash_history_backup_last .bash_history && continue
CopyHist
done
cd /root
cmp -s .bash_history_backup_last .bash_history && exit 0
CopyHist
EOF
chmod +x /etc/cron.daily/bash_history_backup