Aircrack -ng not working

root@kali:~# aircrack-ng –a2 –b F8:1A:67:56:52:36 –w /root/pass.txt /root/Desktop/*.cap Opening –a2 open failed: No such file or directory Opening –b open failed: No such file or directory Opening F8:1A:67:56:52:36 open failed: No such file or directory Opening –w open failed: No such file or directory Opening /root/pass.txt Unsupported file format (not a pcap or IVs file). Opening /root/Desktop/-01.cap Read 219544 packets. # BSSID ESSID Encryption 1 F8:1A:67:56:52:36 khushi sahu WPA (1 handshake) Choosing first network as target. root@kali:~# Why is it showing -a2, -b, -w as "open failed: No such file or directory", although they are aircrack commands? What am I doing wrong?