University of British Columbia
Room DMP 201, 6245 Agronomy Road
May 22-23, 2012
May 22-23, 2012
Some Basic Commands
man |
Documentation for commands. |
cat |
Concatenate and display text files. |
cd |
Change working directory. |
clear |
Clear the screen. |
cp |
Copy files and directories. |
date |
Display the current date and time. |
diff |
Show differences between two text files. |
echo |
Print arguments. |
head |
Display the first few lines of a file. |
ls |
List files and directories. |
mkdir |
Make directories. |
more |
Page through a text file. |
mv |
Move (rename) files and directories. |
od |
Display the bytes in a file. |
passwd |
Change your password. |
pwd |
Print current working directory. |
rm |
Remove files. |
rmdir |
Remove directories. |
sort |
Sort lines. |
tail |
Display the last few lines of a file. |
uniq |
Remove adjacent duplicate lines. |
wc |
Count lines, words, and characters in a file. |
select-species.sh (final version)
# Select all species names from .txt files.
for datafile in $*
do
echo $datafile ':'
cut -d , -f 2 $datafile | grep -v Species | sort | uniq | wc -l
done
harbor/2012-april.txt
Date,Species,Count 2012-05-20,salmon,2 2012-05-20,seal,7 2012-05-21,seagull,35
Some History
501 mkdir ubc 502 cd ubc 507 ls 513 cat data.txt 514 cut -d ' ' -f 1 data.txt 515 ls 517 ls data?.txt 518 mv data.txt data1.txt 519 mv data1.txt data-ubc-may-2012.txt 520 mv data2.txt data-harbor-may-2012.txt 521 ls 522 ls *harbor*.txt 523 ls *-may-*.txt 524 ls 525 cat *ubc* 526 ls 527 cat select-species.sh 528 ls 529 nano tuesday.sh 530 cat tuesday.sh 531 bash tuesday.sh justin bernard alex 532 ls 533 nano select-species.sh 534 cat select-species.sh 535 bash select-species.sh data-*.txt 536 bash select-species.sh data-harbor-may-2012.txt 537 bash select-species.sh data-ubc-may-2012.txt 538 ls 539 history | fgrep mv 540 ls 541 cat tuesday.sh 542 nano milo.sh 543 cat milo.sh 544 bash milo.sh 545 nano milo.sh 546 cat milo.sh 547 bash milo.sh wes ted laura rowan 548 ls 549 bash milo.sh data-*.txt 550 nano select-species.sh 551 cat select-species.sh 552 bash select-species.sh data-*.txt 553 nano select-species.sh 554 bash select-species.sh data-*.txt 555 cat select-species.sh 556 ls /bin 557 ls /usr/bin 558 ls /usr/bin | wc 559 man zipcloak 560 cat select-species.sh 561 ls 562 nano rex.sh 563 bash rex.sh 564 cat rex.sh 565 cat select-species.sh 566 man bash 567 ls 568 cat select-species.sh 571 cat select-species.sh 572 nano select-species.sh 573 cat select-species.sh 574 cut -d , -f 2 data-harbor-may-2012.txt | grep -v Species | sort | uniq 575 cut -d , -f 2 data-harbor-may-2012.txt | grep -v Species | sort | uniq | wc -l 576 nano select-species.sh 577 bash select-species.sh data-harbor-may-2012.txt 578 wc -l data-harbor-may-2012.txt 579 cat data-harbor-may-2012.txt 580 bash select-species.sh data-*.txt 581 cat data-ubc-may-2012.txt 582 nano data-for-test.txt 583 cat data-for-test.txt 584 bash select-species.sh data-for-test.txt 585 wc -l data-for-test.txt 586 bash select-species.sh data-for-test.txt 587 ls 588 ls 589 ssh gvwilson@apps2.cs.utoronto.ca 590 ssh gvwilson@apps2.cs.utoronto.ca "ls" 591 ssh gvwilson@apps2.cs.utoronto.ca "ls" | wc 592 ls 593 rm milo.sh rex.sh tuesday.sh 594 ls 595 mkdir harbor 596 mkdir ubc 597 mkdir osoyoos 598 mv data-harbor-may-2012.txt harbor/2012-may.txt 599 mv data-ubc-may-2012.txt ubc/2012-may.txt 600 cp ubc/2012-may.txt osoyoos/2012-april.txt 601 cp harbor/2012-may.txt harbor/2012-april.txt 603 ls 604 rm data-for-test.txt 606 ls 607 ls */*.txt 608 ls */*.txt | wc -l 609 mkdir harbor/archive 610 cp harbor/2012-april.txt harbor/archive/2011-november.txt 611 ls */*.txt 612 ls */*/*.txt 613 ls */*.txt */*/*.txt 614 find . -name '*.txt' -print 615 find . -name '*may*' -print 616 find . -name '*april*' -print 617 find . -name '*2012*' -print 618 find . -name '*november*' -print 619 find . -type f -print 620 find . -type d -print 621 man find 622 ls 623* 624 find . -type d -print > todo.txt 625 find . -type d -print | while read filename; do wc -l $filename; done 626 find . -name '*-*.txt' -print | while read filename; do wc -l $filename; done 627 find . -name '*-*.txt' -print | while read gauss; do wc -l $gauss; done 628 grep salmon */*.txt 629 grep -h salmon */*.txt 630 grep -l salmon */*.txt 631 grep -l salmon */*.txt | while read gauss; do wc -l $gauss; done 632 grep -l salmon */*.txt | while read mary; do bash select-species.sh $mary; done 633 cat select-species.sh 634 man cut 635 ls 636 cat select-species.sh 637 cat */*.txt 638 ls 639 john='some name or other' 640 echo $john