This day of class new room same old cooling/heating problem. A new semester has pose a new set of challenges and trials to over come and understand and expand my knowledge. Refreshing my unix/linux and feeling like I'm starting from scratch I started to look around in linux and found that i have forgotten much of what I use to take as “old hat” is now almost as new to me as many people now taking i have found myself once again in the lair being clueless coming in and trying to keep up.
ls -list all directories or files man - manual for specified file/function
2nd day of Oops and its hot inside and out and Joe is in good humor like always and is surprisingly on topic for the most part. will be posting 3 files and a wiki update on lab46 opus and bit bucket for bit bucket use from command line internet cert fix and a script for ssh link to bit bucket so you don't have to type in the entire lines to add, commit, push, pull and update.
Ordered List Item irc chat
17 simple steps to making and using your repository from lab46
1. mv src src.bak 2. mkdir src 3. hg clone http://www/hg/user/“yourusername” ~/src 4. to clone remotely such as on home computer or laptop hg clone http://www/hg/user/“yourusername” ~/src 5. cd src 6. mv ~/src.bak/* ~/src 7. rmdir ~/src.bak 8. vi or nano .hg/hgrc 9.*[paths]
10.save and exit 11.nano or vi .hgignore
12. hg status 13. hg add 14. hg commit -m “your add and commit comment” 15. hg push 16. hg pull 17. hg update
finally fixed my mercurial problem on my flash drive and cloned my repository to my lap top and going to do that as well on lab46 errors I received and how i fixed them.
Remembering 9/11/01 is one of the oddest things of my life. I was in class and had no idea that the trade centers were hit by 2 large commercial airliners and had no idea what happened until after school. in honor of that day i am once again in class focusing on studies and writing my opus for linux/unix class.
October 16, 2014
This will post will be everything I have done in both OOPS and Unix/Linux fundamentals
unix notes September 2, 2014 19 simple steps to making and using your repository from lab46
1. mv src src.bak 2. mkdir src 3. hg clone http://www/hg/user/yourusername `/src 4. to clone remotely such as on a home computer or laptop
hg clone http://lab46.corning-cc.edu/hg/user/yourusername ~/src
5. cd src 6. mv ~/src.bak/* ~/src/ 7. rmdir ~/src.bak 8. vi or nano .hg/hgrc 9. [paths]
default = http://www/hg/user/yourusername [web] push_ssl = False allow_push =* [ui] username = Fristname Lastname <yourusername@lab46.corning-cc.edu> [auth] lab46.prefix = http://www/hg/user/youtusername lab46.username = yourusername lab46.username = http
10. save and exit 11. nano or vi .hgignore 12. syntax: glob
13. hg status 14. hg add 15. hg status 16. hg commit -m “your add and commit comment” 17. hg push 18. hg pull 19. hg update unix notes 09/04/2014
cd= change directory
unix command line seqeunce
/=top
-----------------------------------------------------------------
| | | | | | | | |
home mnt
| |
---user---- ---------
| | | | | |
src bin other flash ect.ect.
|
---------
| |
mp3 pictures
pwd=path listing relative path: only work for you Absolute path: works for everyone ls -l long list wil show read write permissions cat: posts it contents of a file to the terminal echo: simple print statement
stdin: defualt input
stdout: defualt output
stderr: defualt output for errors
>: redirects stdout to file (writes)
>>: redirects stdout to file (appeneds)
2>: redirects stderr to file (writes)
2>>: redirects stderr to file (appeneds)
tail: lists last 10 lines (-f tells tail to not exit file when done keep posting) /dev/null: nullifies things sent there
see opus for comand list
9/11/14 project
back to mastering lazy
cd /var/public/unix/project/archive_handling lossy: non data safe after save and use jpeg is a lossy digital format losses quality after copy and moving lossless: smaller compresion but more data is saved
.tar.bz2 compresion .zip use the man pages
1. figure out teh format 2. figure out how to extract 3. find empty or corruptfiles 4. organizer smallest small big and biggest 5. myarchive.tar 6. use -n argument 7. use submit myarchive.tar.gz
September 11, 2014 notes
ed line editor early text editor
Bill Joy: came up with an idea for a text editor -insert
aka visual editor aka vi
Commands
--------
i: insert
h: left by character
j: down by character
l: right by character
k: up by character
number+command: takes you that many in the direction
w: foward by word
b: backward by word
W: forward by spaces
B: backward by spaces
$: end of line
^: start of line
number+G: moves to the line
<<: indent
>>: unindent
x: delete
X: backspace
dw: delete by word
db:
dW:
dB:
d^:
d$:
dd:
p: paste above cursor
P: paste below cursor
s: substitute
cw: change word
cb:
cW:
cB:
C^: change by line start
C$: change by line end
y: yank out a word (aka copy)
yy: yank by line
yb:
yB:
yw:
YW:
u: undo
U:
/: search
n: next forward
N: next backward
:wq: write and quit
:w filename: saves a file by filename
:q: quit
:q!: quit without saving
insert
------
i: insert where you last left off
a: inserts after current character
I: insert at start of line
A: insert at ending of line
o: open a new line below
O: open a new line above
September 18 2014
text processing
vi= best text editor ever
cat= display content of a file
ctrl+s = xoff
ctrl+q = xon
od= octal dump
-x: hex dump
endianness
little endian : lower order
big endian : high order
grep: global regular expression print
\<\>
-i: case insenseitive
-o: only matchinng no line
|: out of left to input to the right
wc= word count
-l: length
September 23 2014
|=pipe : output | input
head: defualt display frist 10 lines
tail: defualt display last 10 linescd
for who.dat
section 1 head -19 who.dat>section1
section 2 head -38 who.dat| tail-19 >section2
section 2x1 tail -19 section4>section2x1
section 3 tail -19 who.dat>section3
section 4 head -38 who.dat>section4
cat section2 section1 section3 >who.all
who.all orginized
cat section2 section1 section3|sort|less
sort: sorts by name of file and if linked to cat siplays in order
bc: base calculator
groups: list groups u are attatched to
september 25 2014
vogue.co.uk up,up,down,down,left,right,left,right,b,a,a,a,a,a,a,
Dinosuars with hats
qoutes '-fullqoute, literal qoute
"-half qoute, allow for expansion(varible)
`-backtick,command expansion
cut - cuts lines and prints them out
making cmdline varibles
; seperate commands on a single line
sleep wait for so many seconds
October 3, 2014
wildcards
---------
?- matches any single character
[]-character class, match any of the enclosed characters(just one)
*-matches zero or more of any character
[^]- inverted character class, do not match any of the enclosed
logic operations
----------------
|-or operand
egerp
-----
''-match anything inside the qoutes
October 7, 2014
a process is a program in action (is a running programing)
PID max pid is 2^16=65536
starts at 1 reserved for init
ps = list of running process
kill = signal and system call ends processes: kill -# "PID"
top= currently running process
october 9, 2014
ls list files in directors
-a to ls list hidden files
alias lists the preset
alias can also set names for commands
unalias can undo aliases
PS1 sets command line prompt
wall send a message to users
PATH set or change paths
#! - sh-bang
tab - partial start a command and its arguments and pressing tab will attempt to complete
bash syntex
-gt greater then
-ge greater then or equal to
-lt less then
-le less then or equal to
-ne not equal to
-eq equal to
October 10, 2014
largest mv i ever used
mv 2darry.c Rockpapersissors.c StatementsSano.c Task4.o array.c array.o array2.c binary.c binary2.c clab.c clab.o cprogtask1 cprogtask2 cprogtask3 cprogtask4 cprogtask4 cprogtask5 cprogtask6 cprogtask7 crpogtask8 cprogtask9 cprogtask A floatapp.c functions.c fwg.c gfxfun.c hello.c hello.o ifselect.c looparry.c nocapes.c notes numberfun7.c numberfun7.o rand.c rand.o shovelingbob sqaures.c srandtime.c taskx.c var1.c var1.o vbs Programs
october 23, 2014
#!/bin/bash total=0 evens=0 for number in `cat data`;do evenchk=`echo “$number%2”|bc` if [ “$evenchk” -eq 0 ]; then let evers=$evens+1 fi let total =$total+1 done echo “out of $total numbers, there are $evens even numbers” exit 0 using bash to pull data out of status for current grades
November 4, 2014
1 #include<stdio.h>
2 #include<stdlib.h>
3
4 class rectangle
5 {
6 public:
7 int area();
8 int perimeter();
9 rectangle();
10 rectangle(int,int);
11
12 private:
13 int length;
14 int width;
15 };
16 int rectangle::area()
17 {
18 return((length*width));
19 }
20 int rectangle::perimeter()
21 {
22 return((length+length+width+width));
23 }
24 rectangle::rectangle()
25 {
26 width=0;
27 length=0;
28 }
29 rectangle::rectangle(int length, int width)
30 {
31 this->length=length;
32 this->width=width;
33 }
34 int main()
35 {
36 int area=0;
37 int perimeter=0;
38 rectangle rect1;
39 rectangle *rect2;
40 rect2=new rectangle(4,10);
41 area=rect1.area();
42 perimeter=rect1.perimeter();
43 printf("rect1 area is: %d\n", area);
44 printf("rect1 parimeter: %d\n", perimeter);
45 area=rect2->area();
46 perimeter=rect2->perimeter();
47 printf("rect2 area is: %d\n", area);
48 printf("rect2 parimeter: %d\n", perimeter);
49 return(0);
50 }