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Table of Contents
unix Keywords
Keyword "df"
Definition
df locates all of the running directories used by a users system and each directories disk space usage.
Demonstration
lab46:~$ df Filesystem Size Used Avail Use% Mounted on /dev/xvda1 4.0G 2.5G 1.4G 65% / tmpfs 766M 0 766M 0% /lib/init/rw udev 738M 36K 738M 1% /dev tmpfs 766M 4.0K 766M 1% /dev/shm /dev/xvda2 248M 13M 223M 6% /tmp nfs:/home 2.8T 1.4T 1.4T 49% /home nfs:/lib/mail 2.8T 1.4T 1.4T 49% /var/mail lab46:~$
Keyword "who"
Definition
The who command shows who is currently logged on and if their messaging is on(+) or off(-).
Demonstration
Demonstration of the chosen keyword.
lab46:~$ who NAME LINE TIME IDLE PID COMMENT jjohns43 + pts/24 2012-01-23 12:18 08:45 701 (cpe-74-65-82-173:S.0) jjohns43 + pts/26 2012-02-29 14:40 old 21533 (cpe-74-65-82-173:S.1) thakes3 + pts/32 2012-03-16 15:39 03:44 6464 (:pts/8:S.0) wedge - pts/72 2012-04-01 09:42 00:32 10102 (telstar.lair.lan) tedmist1 + pts/74 2012-04-01 12:53 00:34 13120 (cpe-67-252-119-108.stny.res.rr.com) mfaucet2 + pts/87 2012-04-01 14:36 . 14073 (189.sub-166-248-14.myvzw.com) jjohns43 + pts/82 2012-02-27 11:03 08:45 26118 (cpe-74-65-82-173:S.0) jjohns43 + pts/93 2012-02-27 11:13 08:45 26196 (cpe-74-65-82-173:S.0) lab46:~$
Keyword "tty"
Definition
The command “tty” prints the file name of the terminal connected to the standard input
Demonstration
lab46:~$ tty /dev/pts/87 lab46:~$
Keyword "mesg"
Definition
The “mesg” command without y or n displays whether messaging to the user is available. With mesg y mesg is turned on. With mesg n mesg is turned off.
Demonstration
lab46:~$ mesg is y lab46:~$ mesg n lab46:~$ mesg is n lab46:~$ mesg y lab46:~$ mesg is y lab46:~$
Keyword ctrl + C
Definition
Stops a command from running.
Demonstration
lab46:~$ cat ^C lab46:~$
Keyword "/dev/null"
Definition
A directory where anything unneeded can be piped to.
Demonstration
lab46:/$ find / -name "hello" 2> /dev/null /home/mfaucet2/devel/hello /home/bkenne11/hello /home/bkenne11/devel/hello /var/public/unix/patterns/hello /var/public/unix/scripting/hello /var/public/cs265/hello /var/public/cs265/hello/hello /usr/share/doc/libtcltk-ruby1.9.1/examples/demos-en/hello /usr/share/doc/libtcltk-ruby1.9.1/examples/demos-jp/hello /usr/share/doc/tk8.4/examples/hello lab46:/$
Keyword "gcc"
Definition
gcc is a command that compiles code in C.
Demonstration
lab46:~/devel$ gcc -o test test.c lab46:~/devel$ ls test test.c lab46:~/devel$
Keyword "chmod
Definition
The command “chmod” changes the permissions of a file or directory. This command is needed to make a script usable.
Demonstration
lab46:~/scripts$ ls guess.sh lab46:~/scripts$ ./guess.sh -bash: ./guess.sh: Permission denied lab46:~/scripts$ chmod -c 755 guess.sh mode of `guess.sh' changed to 0755 (rwxr-xr-x) lab46:~/scripts$ ./guess.sh hello lab46:~/scripts$
unix Objective
Objective
To learn more about how Unix functions and learn the commands to help make everyday work easier.
Definition
The easiest way to find out the functions of Unix is to play around with them. Some help with work that needs to be done and other help make the experience more enjoyable. All around Unix just helps makes doing things easier.
Method
In order to help me achieve higher learning in Unix i will have to do the assignments for the Unix Fundamentals class. In order to do these I will have to be fully engaged in critical thinking and completely indulged in the work that needs to be done.
Measurement
After following my method of achieving higher learning in Unix I have now understood the most recently due assignments after learning how Unix commands work. To achieve this I did what my method said and have handed in my assignments on time.
Analysis
The keywords in the above part of the opus are commands that I have become more familiar with and are more comfortable using those commands without making a huge mess in my virtual machine, like I was when the class first started out.
