I am using Fedora28 and installed Quartus SW version 19.4, when calling quartus from /bin folder i get the following
(base) [root@analytics-X10-SM547 bin]# ./quartus
./quartus: line 62: /root/intelFPGA_pro/19.4/quartus/bin/adm/qenv.sh: No such file or directory
./quartus: line 64: test: !=: unary operator expected
./quartus: line 66: exec: quartus: not found
You can navigate to where Quartus path installation and invoke the Quartus from there. For window normally <installation-directory>\bin64\quartus and Linux is <installation-directory>/quartus/bin/quartus.