Some Unix/Linux command:

Some Unix/Linux command:

create symbolic link:
ln -s {target-filename} {symbolic-filename}

copy symbolic file:
cp -RH

unzip all zip files under current directory to /tmp:
unzip \*.zip -d /tmp

mkdir Create any missing intermediate pathname components:
mkdir -p

rsync:
/usr/local/bin/rsync --stats --recursive --times --perms --links --delete --inplace /source /target

check the Linux package installed.
rpm -qa --queryformat "%{NAME}-%{VERSION}-%{RELEASE} (%{ARCH})\n" | grep your_package_name

and more...................