To pipe the output from one command into another command: who | ... The standard output from the who command - a list of all the users currently logged in on the system - is piped into the wc command as its standard input. Used with the -l option this command counts the numbers of lines in the standard input and displays the result on the standard output. To connect several commands together: ps -aux|grep joe|sort +5 -6|less . ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... Using UNIX System Calls and Library Functions . ... To use system calls and library functions in a C program we simply call the appropriate C function. Examples of standard library functions we have met include the higher level I/O functions -- fprintf() , malloc() .. ... For most system calls and library functions we have to include an appropriate header file. e.g. stdio.h, math.h . ... Information on nearly all system calls and library functions is available in manual pages. ...

multi-rsh is a perl script which runs the same command on multiple machines, in parallel, and provides reasonable, adjustable timeouts for those machines which fail to answer. Both standard output and standard error are returned through the same channel, and all output has the hostname prepended to each line. Multi-rsh must be run as root (remote jobs can be set to run as any user, see Options below). ... Neither form allows you to directly pass input to the remote programs. ...

... Standard Commands . ... TwistedActor.Actor is core code for writing an actor: an instrument control computer (ICC) or hub-based script that does something useful. This manual describes the standard commands and keywords that any actor based on TwistedActor.Actor will support. All actors based on TwistedActor typically support the following standard commands (plus additional device-specific commands documented in that actor's manual). ... Connect one or more devices (if not already connected). ...

Next: Examples of Setup Files Up: Setup Files Previous: Setup Files Contents . Over 200 standard setup files have been created, covering many of the normal modes of observing. ... These especially include precisely defined, and somewhat complex cases like the Mark III standard modes (although MarkIII went the way of the dinosaur long ago. ... v '' files: . These are setup files for VLBI observations using VLBA recording formats. ... These are setup files for Mark III observations. ...

... The material in "From Stargazers to Starships" meets several important requirements of the national standards. Pages cited below are from National Science Education Standards National Academy Press, Washington 1995. ... For example: the sections on astronomy not only describe calendars and sundials (including their construction), but also the astronomy of the ancient Greeks, including two different ways in which ancient Greeks estimated the distance to the Moon. ...

... The frames, as they appear on the monitor with the command LOAD/IMAGE , are in general not oriented properly. ... This means that the frames have to be rotated in such a way that: . ... ROTATE/ECHELLE inputspec outframe mode . ... The command ROTATE/ECHELLE sets descriptor values START and STEP to 1.,1. for all images and updates the session keyword CCDBIN to the original steps of the images. These operations must be performed by the user if another command than ROTATE/ECHELLE is applied. ...

The first character in each record (line) of formatted output defines a carriage control character to the lineprinter, often called ASA-character, for a previous name of the US Standardization Organization ANSI. ... When using VAX/VMS for output first on a file, which is to be printed later on paper, it is advisable to use the extension .DAT . ... You use the compiler switch -vms f77 -vms prog.f and get the control characters removed from the screen output. ...

... Binary large object. ... CGI is a popular interface used to create server-based web applications with languages such as Perl or C. A web browser, such as Netscape Navigator. ... Core JavaScript contains a core set of objects, such as Array , Date , and Math , and a core set of language elements such as operators, control structures, and statements. ... A JavaScript primitive value is a member of one of the following types: undefined , null , Boolean , number , or string . ... World Wide Web . ...