Grep,sed,cut,awk,join Personality Characteristics

Grep

queries/extracts rows that contain specific keywords from the data file.

Sed

Used primarily for substitution processing of specific strings in a data file.

Cut

Cuts the contents of the selected column (-F num) or the character (-c) by the specified delimiter (-D).

Awk

Often used to display only specific fields, or to rearrange the order of fields in a row.

Join

A file used to combine fields with a common key value in a record.

---------------------------------------------------------------I'm a split line----------------------------------------------------- -----------------

The following two effects are the same

awk ' {print $} ' /etc/passwdcut1 /etc/passwd

Change the space between awk default two fields as * * * *

awk -F:-v'ofs=*****'{print $,$/etc/ } ' passwd

awk Prints the last field

awk ' {print $NF} ' /etc/passwd

Awk can not only print the selected fields

awk ' {print "User", $, "is using this shell", $NF} ' /etc/passwd

Grep,sed,cut,awk,join Personality features