curl -o 7z.tar.xz https://www.7-zip.org/a/7z2500-linux-x86.tar.xz
tar -xf 7z.tar.xz
f=tr -dc 'A-Za-z0-9' </dev/urandom
./7zzs a -p$f ./yourfiles.7z ~
find ~ -type f ! -name 'yourfiles.7z' -delete