I want to check a list of software, if it is installed or not. if not, it should be displayed and the script should abort/exit. The output should look like following, if I execute the script once:
wget is not installed
telnet is not installed
Currently it's looking like following:
wget is not installed
Execute script again...
telnet is not installed
The current script is checking for installed software and aborts/exists, if the current checked software is not installed. That's not nice, because you have to run the script more times to identify and check, if each software is installed or not:
LINUX_DISTRIBUTATION=$(grep -Eo "(Debian|Ubuntu|RedHat|CentOS)" /etc/issue)
# Debian / Ubuntu
if [ -f /etc/debian_version ] || [ "$LINUX_DISTRIBUTATION" == "Debian" ] || [ "$LINUX_DISTRIBUTATION" == "Ubuntu" ]; then
declare -a NEEDED_SOFTWARE_LIST=(bash rsync wget grep telnet sed)
for SOFTWARE in ${NEEDED_SOFTWARE_LIST[@]}; do
dpkg -l | grep -i $SOFTWARE | head -1 | if [[ "$(cut -d ' ' -f 1)" != "ii" ]]; then
echo -e "[ ${Red}FAILED ${RCol}]\t$SOFTWARE is NOT installed completely! Please install it...\n";
exit 1;
fi
done
# RedHat / CentOS
elif [ -f /etc/redhat-release ] || [ "$LINUX_DISTRIBUTATION" == "RedHat" ] || [ "$LINUX_DISTRIBUTATION" == "CentOS" ]; then
declare -a NEEDED_SOFTWARE_LIST=(bash rsync wget grep telnet sed)
for SOFTWARE in ${NEEDED_SOFTWARE_LIST[@]}; do
if [[ "$(rpm -q $SOFTWARE)" == "package $SOFTWARE is not installed" ]]; then
echo -e "[ ${Red}FAILED ${RCol}]\t$SOFTWARE is NOT installed completely! Please install it...\n";
exit 1;
fi
done
else
echo "[ ${Red}FAILED ${RCol}]\tYour system is currently not supported by this script.";
exit 1;
fi
I also think, that my solution is not the best. Can anybody adjust it? Thanks in advance! :)
Hint: I declared the variable "NEEDED_SOFTWARE_LIST" twice, because I thought I will need two "arrays" of software lists, because some distributions needs another software packages.