It depends on where the 000 is being used. For permissions, it would indicate that the file or directory or device has no permissions at all. For the 'umask' it would indicate that all newly created files or directories would have wide open permissions (world read, world write, etc.).
Yes you can. Unix understands both FAT32 and NTFS file systems.
in unix permission is represent by rwx and owner group all. so 100 can be break into 001 000 000 which means only execute permission to owner.
Hierarchical
For Unix systems that are only talking to other Unix systems NFS (Network File System) is the most popular. If you want to share Unix files with Windows systems, then Samba is one of the most popular ways to accomplish this.
I think you mean the regular expression tool "grep".
Consult any reference on Unix for this information. Although they can vary and this is not a complete list, but most systems will have the following file systems: /bin /etc /tmp /usr /boot /etc /lib /opt /var /
it is a command in unix and unix like operating systems that places a string on the computer terminal.It is typically used in shell scripts and bath files screen or a file.
Unix-like operating systems are used to save files on a computer operating system. When using this type of system, to unlink a file means to erase or delete it.
William Lund has written: 'Integrating UNIX and PC network operating systems' -- subject(s): Computer networks, Operating systems (Computers), UNIX (Computer file)
The most common between Unix systems would be NFS Network File System.
In some Unix and Linux systems there is a command called 'dos2unix' that will do the conversion automatically. If there isn't such a utility on your system you can use the 'tr' translate command to do the translation: tr -d '\015' < windows-file > unix-file which is essentially what dos2unix will do.
The Unix file contains which kinds of fields?