rm -i #rm waits for a response first
cat file.txt #content of file
less #content of the file with "end"
more #content of the file without "end"
hostname #hostname!
cp #copy from source-file to destination-file, If the destination-file exists before you give a cp command, cp
overwrites it.
cp -i #gives a warning if the file exist
mv #from existing-filename new-filename, also destroys existing files. use it to rename
mv -i $with warning
lpr #printing
grep 'string' file #searches file for string (more on grep later)
head file #displays beginning of a file
tail -5 file #displays last 5 lines of a file
sort #displays file in order without changing it -u (unique lines only) -n (numerical order)
uniq #displays with duplicates removed
diff #comparing two files (try with -u)
file #look at file properties
date #date
script #record session followed by exit to stop recording
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