a - nl command nl command is used to number lines of text lines It is useful when referencing or citing specific lines in a document common options: -b a → number all lines, default -b t → number non blank lines, -n ln|rz|rn → sets specified format -i # →overrides default incremetn nl filename.txt →numbers lines nl -n rz filename.txt → numbers lines and sets right alignment and fills with zeros nl -n ln filename.txt → numbers lines and sets left alignment nl -n rn filename.txt →numbers lines and sets right alignment nl -i 2 filename.txt → numbers lines but increments by 2
b - fold command fold command wraps input text into a specified width It is useful for formatting long lines of text into readable paragraphs common commands: -w# → specifies the length(n) of the line -s → breaks lines on spaces fold longtext.txt → wraps the text on default length fold -w20 longtext.txt → specifies the line length to 20 fold -s longtext.txt → breaks the lines on space
c - fmt command fmt command formats text paragraphs It automatically adjusts the length of lines to fit within width margins Default length is 75 characters common options: -w → specifies the line length -c → paragraphs have consistent line length by breaking them at a natural stopping point fmt format.txt → formats the text at 75 characters long fmt -w20 format.txt → specifies the line length to 20 fmt -w20 -c format.txt → specifies the length and breaks them at a natural stopping point