need to remember few commands to run file manger

I start to use the x-window but I can only run those command in terminal mode I can use sudo -i but I can not activate the file manager in ubuntu by luck I found it is call the root@kohfamily-desktop:/usr/java# nautilus ** (nautilus:5175): WARNING **: Unable to add monitor: Operation not supported Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory Please ask your system administrator to enable user sharing. [when i try to copy this portion, as window user i use CTRL-C and it stop the process ] now i remember i can use #nautilus & or use CTRL-Z to run in the background anyway, for the time being it is working Still i need to run terminal by activating in file manager as previous in Solaris environment I will able to open terminal with directory where ever the file manager stop It save the typing in terminal mode BTW. the command # xterm & run the x-windows terminal and black background seem better for me to read but then nautilus & still better to use as it has copy and paste further more i found that i can toggle directory location bar to text base. So i can copy and paste into the terminal The other command I remember now is df . And the command df give kohfamily@kohfamily-desktop:~$ df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sdb2 10309828 2761676 7024436 29% / tmpfs 222284 0 222284 0% /lib/init/rw varrun 222284 112 222172 1% /var/run varlock 222284 0 222284 0% /var/lock udev 222284 160 222124 1% /dev tmpfs 222284 76 222208 1% /dev/shm lrm 222284 2192 220092 1% /lib/modules/2.6.28-15-generic/volatile /dev/sdb3 6815184 240248 6228736 4% /home /dev/sdb1 16334 11016 5318 68% /media/Ubuntu Inst /dev/sda1 71139568 23570044 47569524 34% /media/disk