|
|
1.1 ! root 1: #print ! 2: Most of the programs we have studied so far produce their ! 3: output on the terminal -- examples are "ls", "spell", "grep", ! 4: "date", "who", and so on. (Of course, some do not, like ! 5: "mv", "cp", and "rm".) In any case, it is sometimes useful ! 6: to be able to capture the output of a program in a file, ! 7: so it can be used in some later processing. This is very easy. ! 8: For example, to get the current date and time in a file called ! 9: "now", you need only type ! 10: ! 11: date >now ! 12: ! 13: The symbol ">" tells the command interpreter that output ! 14: is to go into the file whose name follows. If the file already ! 15: exists, its old contents will be clobbered, so use discretion. ! 16: ! 17: Your task is to make a list of the files in this directory ! 18: in the file "foo". ! 19: When you have finished, type "ready". ! 20: #create X1 ! 21: #create junk ! 22: #create glop ! 23: #create junk1 ! 24: asdfadfaf ! 25: #create junk2 ! 26: qerqerqrq ! 27: #user ! 28: ls >X1 ! 29: #cmp X1 foo ! 30: #log ! 31: #next ! 32: 2.1b 10
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.