uniq
What is uniq?
uniq(1) - report or filter out repeated lines in a file
DESCRIPTION
The uniq utility reads the specified input_file comparing adjacent lines,
and writes a copy of each unique input line to the output_file. If
input_file is a single dash (`-') or absent, the standard input is read.
If output_file is absent, standard output is used for output. The second
and succeeding copies of identical adjacent input lines are not written.
Repeated lines in the input will not be detected if they are not adja-
The uniq utility reads the specified input_file comparing adjacent lines,
and writes a copy of each unique input line to the output_file. If
input_file is a single dash (`-') or absent, the standard input is read.
If output_file is absent, standard output is used for output. The second
and succeeding copies of identical adjacent input lines are not written.
Repeated lines in the input will not be detected if they are not adja-
cent, so it may be necessary to sort the files first.
|
uniq -d
|
only show lines which occur more then once
|
|
uniq -u
|
only show lines that doesn’t occur more then once
|
|
uniq
|
show the input where the repeated lines are filtered out
|
|
uniq -c
|
show the count of number of times the line occur
|
sort
What is sort?
sort(1) - sort lines of text files
|
sort -b
|
ignoring blank characters
|
|
sort -d
|
sorts in alphabetic order (only characters, numbers and blank characters have impact)
|
|
sort -f
|
considers big letters as small and ignores the difference.
|
|
sort -n
|
sort in nummerical order
|
|
sort -r
|
turn the sort order upside down
|
|
sort -t
|
add a field separator after -t
|
|
sort -k
|
sort the field number after -k
|
wc
What is wc?
wc(1) - word, line, character, and byte count
|
wc
|
shows count of lines, words and character’s
|
|
wc -w
|
show only amount of words
|
|
wc -l
|
show only amount of lines
|
|
wc -c
|
show the amount of character’s
|
cat
What is cat?
cat(1) - concatenate and print files
|
cat -b
|
number the non-blank output lines
|
|
cat -n
|
number the output lines
|
|
cat -v
|
display non-printing characters
|
cut
What is cut?
cut(1) - cut out selected portions of each line of a file
|
cut -c2
|
show only the second column
|
|
cut -1-3
|
show only character’s from column 1 to 3
|
|
cut -c2-
|
show only character’s from column 2 to and all the other columns
|
|
cut -c-10
|
show only character’s from columns 1 to 10
|
|
cut -f2
|
show field number 2
|
|
cut -d’:’ -f1 /etc/passwd
|
show field number 1 when the field delimiter is :
|
grep
What is grep?
grep(1) - Print lines matching a pattern
|
grep -i
|
ignore case sensitive matching
|
|
grep -c
|
show the amount of matched patterns
|
|
grep -n
|
show the line number of matched patterns
|
|
grep -l
|
show a list of files containing the matched patterns
|