Lab46 Wiki

df locates all of the running directories used by a users system and each directories disk space usage.

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:~$

The who command shows who is currently logged on and if their messaging is on(+) or off(-).

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:~$

The command “tty” prints the file name of the terminal connected to the standard input

lab46:~$ tty
/dev/pts/87
lab46:~$

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.

lab46:~$ mesg
is y
lab46:~$ mesg n
lab46:~$ mesg
is n
lab46:~$ mesg y
lab46:~$ mesg
is y
lab46:~$

Stops a command from running.

lab46:~$ cat
^C
lab46:~$

A directory where anything unneeded can be piped to.

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:/$

gcc is a command that compiles code in C.

lab46:~/devel$ gcc -o test test.c
lab46:~/devel$ ls
test test.c
lab46:~/devel$

The command “chmod” changes the permissions of a file or directory. This command is needed to make a script usable.

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$

To learn more about how Unix functions and learn the commands to help make everyday work easier.

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.

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.

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.

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.