tailieunhanh - UNIX System administration P5

Lưu ý tất cả các tùy chọn mà phải mất một danh sách các đối số muốn có một danh sách bằng dấu phẩy. Nếu bạn bao gồm các không gian giữa các mục, bạn phải đưa danh sách trong dấu ngoặc thống dòng máy in được điều khiển bởi các siêu người dùng sử dụng LPC. Nếu không có bất kỳ đối số, một chế độ tương tác được nhập | UNIX System Administration lpstat options Options -a printers Are printers accepting requests -d Print name of default system printer -o printers Status of print requests -p printers Status of printers -r Status of the line printer daemon Ipd -s Status summary -t All status information -u users Status of users print requests Note all options that take a list of arguments want a comma-separated list. If you include spaces between items you must put the list in quotes. The lpc command - line printer control Syntax etc lpc command argument. The line printer system is controlled by the superuser using Ipc. Without any arguments an interactive mode is entered use to list commands and help command for further information on a command. Rudolf Cardinal August 1995 41 UNIX System Administration Using tape drives Remember the difference between dev rmt and dev nrmt the latter doesn t rewind after a program closes the device. Magnetic tape manipulation mt Syntax mt -f tapedevice command count This command performs command count times default 1 on device tapedevice default is the TAPE environment variable or dev nrmt0h . Important commands are as follows bsf Backspace count files fsf Forward-space count files offline rewoffl Rewind the tape and place the unit off-line retension Retensions the tape move tape one complete pass between the end and the beginning rewind Rewinds the tape status Prints status information Examples mt -f dev rmt01 rewind mt -f dev nrmtlh fsf 3 Backing up data dump Syntax etc dump key argument. filesystem dump copies all files changed after a certain date from a specified filesystem to a file pipe tape disk. The key specifies the date and other options. dump requires operator attention in situations where an end-of-tape occurs when dump ends or when an unrecoverable read error occurs. dump can write to all users in the operator group when it needs attention and talks to its user at the control terminal. It gives progress reports and asks yes no .