Prerequisites

Question 1

absolute path

Answer 1

/home/mgk25/wg/teaching/unixtools/Makefile

Question 2

relative path

Answer 2

f2.txt or wg/teaching/ or ../../proj/phd.tex

Question 3

print current working directory: pwd

Answer 3

pwd – starting point whenever you provide just a filename / subdirectories to descend into

Question 4

synonym for cwd

Answer 4

single dot

Question 5

listing a directory

Answer 5

: ls or ls -la or ls path

if file starts with . ls doesn’t show it, -la … l = long format, a = all files including ones starting with .

Question 6

text editor

Answer 6

emacs path, nano path

Question 7

deleting a file:

Answer 7

rm path

Question 8

make a new directory: mkdir path

Answer 8

• makes new directory

Question 9

deleting an (empty) directory: rmdir path

Answer 9

• without special options, rm cannot delete a directory

Question 10

rename or move a file or directory: mv oldpath newpath

Answer 10

• if mv between different filesystems first copies then deletes
• otherwise, on same file system it’s constant time
• mv is used to rename a file … moving to a new name in the same directory
• can be used to replace a file – mv will atomically overwrite the target file

Question 11

leave:

Answer 11

exit

Question 12

Remote login

Answer 12

SSH

- linux.cl.ds.cam.ac.uk,