Information Technology > STUDY GUIDE > University of Technology SydneyIT AND ENG C10345v1Linuxgym (All)
Linuxgym Chapter 1: The Filesystem Create a file Create a file called "hello.world" (without the quotes). [nour@localhost ch1]$ touch hello.world Create a directory Create a directory called "ot ... herworld" (without the quotes) within your ch1-fdr directory. [nour@localhost ch1]$ mkdir otherworld Store a calendar Store the 2008 calendar produced by the "cal" command in the file "calendar" with no modifications to the output of the "cal" command. [nour@localhost ch1]$ cal > calendar List visible files List all (non-hidden) files in the directory "/usr/local/linuxgym-data/gutenberg" and store this list into a file called "listvis". Ensure that this is exactly the output of the command "ls". [nour@localhost ch1]$ ls /user/local/linuxgum-data/gutenberg > listvis List all files List all files in the directory "/usr/local/linuxgym-data/gutenberg" (including hidden files, but NOT including directories) and store this list into a file called "allfiles". Ensure that this is exactly the output of the command "ls". It may be helpful to consider the "all" and "almost-all" options in the ls manual page. [nour@localhost ch1]$ ls –A /user/local/linuxgum-data/gutenberg > allfiles Top of file The "cat" function prints out the contents of a file. For example "cat /usr/local/linuxgym-data/census/aj_malenames.txt" shows you an alphabetically ordered list of male names recorded by the US Census Bureau. Because the list scrolls off the top of the screen, you can not easily read the first 10 names. The "head" command solves this problem. Experiment with the "head" command and store the first 10 lines from the file aj_malenames.txt into a file called "first-ten-names.txt". [nour@localhost ch1]$ head /user/local/linuxgum-data/census/a-j_malenames.txt > first-ten-names.txt Merging files The "cat" function which prints out the contents of a file, can be used to print the contents of several files by giving it more than one argument. In the directory /usr/local/linuxgym-data/census/ there are two files: a-j_malenames.txt and k-z_malenames.txt. Use "cat" to print out both of these files and store the output in a file called "a-z_malenames.txt" in the correct order. [nour@localhost ch1]$ cat /user/local/linuxgum-data/census/a-j_malenames.txt > a-z_malenames.txt [nour@localhost ch1]$ cat /user/local/linuxgum-data/census/k-z_malenames.txt >> a-z_malenames.txt [Show More]
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