codes Flashcards

1
Q

displays file contents onscreen or provide file contents to standard output

A

cat FILENAME

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2
Q

display files 1 and 2

A

cat FILE1 FILE2

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3
Q

return to home directory

A

cd

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4
Q

move up one level in the directory tree

A

cd ..

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5
Q

move to the /etc directory relative to the system root

A

cd /etc

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6
Q

use a tilde as a shortcut to get to your home directory, this moves you to the subdirectory

A

cd ~/subdir

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7
Q

move to the Projects directory relative to the current directory

A

cd Projects

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8
Q

Filter backspaces and reverse line feeds out of input. Use to make man pages editable without odd formatting

A

col -b

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9
Q

Close your current process (often a shell) and your Unix session if you close the login shell

A

CTRL D

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10
Q

close your current shell and your Unix session if you are in login shell

A

exit

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11
Q

Use to view Filename screen by screen

A

less Filename

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12
Q

close your Unix session

A

logout

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13
Q

list files and directories

A

ls

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14
Q

list the files and directories in the root directory

A

ls /

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15
Q

list the files and directories in a directory

A

ls directoryname

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16
Q

list all files and directories, including hidden ones

17
Q

list files and directories by modification date

A

ls -c or ls -t

18
Q

list files and directories in long format, with extra information

19
Q

list files and directories in long format, with extra information and human readable sizes

20
Q

view the specified section (5) of the man pages for command. Sometimes used a man -s 5 Command

A

man 5 command

21
Q

view the manual (help) pages for command

A

man command

22
Q

find appropriate man pages for “keyword”

A

man -k keyword

23
Q

view filetoview screen by screen

A

more filetoview

24
Q

change your password

25
display the path and name of the directory you are currently in
pwd
26
reset the shell to fix display problems
reset
27
try to fix unexpected, sudden and strange display problems
stty sane
28
Re-log in without having to log out
su -yourid
29
become the root user
su
30
run a command with the authority of root user
sudo commandname
31
copy existingfile to a file named newfile
cp existingfile newfile
32
copy existingfile to a file named newfile, prompting you before overwriting existing file
cp -i existingfile newfile
33
copy the directory /Projects to the new name /shared/Projects, specifying recursive copy
cp -r /Projects /shared/Projects