|  | Index Entry | Section | 
|---|
| 
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| 1 |  |  | 
|---|
|  | 128-bit checksum | 6.4 md5sum: Print or check message-digests | 
|  | 16-bit checksum | 6.2 sum: Print checksum and block counts | 
| 
 | 
| A |  |  | 
|---|
|  | across columns | 4.2 pr: Paginate or columnate files for printing | 
|  | all duplicate lines, outputting | 7.2 uniq: Uniquify files | 
|  | alnum | 9.1.1 Specifying sets of characters | 
|  | alpha | 9.1.1 Specifying sets of characters | 
|  | ASCII dump of files | 3.4 od: Write files in octal or other formats | 
| 
 | 
| B |  |  | 
|---|
|  | backslash escapes | 9.1.1 Specifying sets of characters | 
|  | binary and text I/O in cat | 3.1 cat: Concatenate and write files | 
|  | binary input files | 6.4 md5sum: Print or check message-digests | 
|  | blank | 9.1.1 Specifying sets of characters | 
|  | blank lines, numbering | 3.3 nl: Number lines and write files | 
|  | blanks, ignoring leading | 7.1 sort: Sort text files | 
|  | body, numbering | 3.3 nl: Number lines and write files | 
|  | BSD sum | 6.2 sum: Print checksum and block counts | 
|  | BSD tail | 5.2 tail: Output the last part of files | 
|  | bugs, reporting | 1. Introduction | 
|  | byte count | 6.1 wc: Print byte, word, and line counts | 
| 
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| C |  |  | 
|---|
|  | case folding | 7.1 sort: Sort text files | 
|  | cat | 3.1 cat: Concatenate and write files | 
|  | characters classes | 9.1.1 Specifying sets of characters | 
|  | checking for sortedness | 7.1 sort: Sort text files | 
|  | checksum, 128-bit | 6.4 md5sum: Print or check message-digests | 
|  | checksum, 16-bit | 6.2 sum: Print checksum and block counts | 
|  | cksum | 6.3 cksum: Print CRC checksum and byte counts | 
|  | cntrl | 9.1.1 Specifying sets of characters | 
|  | comm | 7.3 comm: Compare two sorted files line by line | 
|  | common field, joining on | 8.3 join: Join lines on a common field | 
|  | common lines | 7.3 comm: Compare two sorted files line by line | 
|  | common options | 2. Common options | 
|  | comparing sorted files | 7.3 comm: Compare two sorted files line by line | 
|  | concatenate and write files | 3.1 cat: Concatenate and write files | 
|  | context splitting | 5.4 csplit: Split a file into context-determined pieces | 
|  | converting tabs to spaces | 9.2 expand: Convert tabs to spaces | 
|  | copying files | 3.1 cat: Concatenate and write files | 
|  | CRC checksum | 6.3 cksum: Print CRC checksum and byte counts | 
|  | crown margin | 4.1 fmt: Reformat paragraph text | 
|  | csplit | 5.4 csplit: Split a file into context-determined pieces | 
|  | cut | 8.1 cut: Print selected parts of lines | 
|  | cyclic redundancy check | 6.3 cksum: Print CRC checksum and byte counts | 
| 
 | 
| D |  |  | 
|---|
|  | deleting characters | 9.1.3 Squeezing repeats and deleting | 
|  | descriptor follow option | 5.2 tail: Output the last part of files | 
|  | differing lines | 7.3 comm: Compare two sorted files line by line | 
|  | digit | 9.1.1 Specifying sets of characters | 
|  | double spacing | 4.2 pr: Paginate or columnate files for printing | 
|  | down columns | 4.2 pr: Paginate or columnate files for printing | 
|  | duplicate lines, outputting | 7.2 uniq: Uniquify files | 
| 
 | 
| E |  |  | 
|---|
|  | empty lines, numbering | 3.3 nl: Number lines and write files | 
|  | entire files, output of | 3. Output of entire files | 
|  | equivalence classes | 9.1.1 Specifying sets of characters | 
|  | expand | 9.2 expand: Convert tabs to spaces | 
| 
 | 
| F |  |  | 
|---|
|  | field separator character | 7.1 sort: Sort text files | 
|  | file contents, dumping unambiguously | 3.4 od: Write files in octal or other formats | 
|  | file offset radix | 3.4 od: Write files in octal or other formats | 
|  | fingerprint, 128-bit | 6.4 md5sum: Print or check message-digests | 
|  | first part of files, outputting | 5.1 head: Output the first part of files | 
|  | fmt | 4.1 fmt: Reformat paragraph text | 
|  | fold | 4.3 fold: Wrap input lines to fit in specified width | 
|  | folding long input lines | 4.3 fold: Wrap input lines to fit in specified width | 
|  | footers, numbering | 3.3 nl: Number lines and write files | 
|  | formatting file contents | 4. Formatting file contents | 
| 
 | 
| G |  |  | 
|---|
|  | general numeric sort | 7.1 sort: Sort text files | 
|  | graph | 9.1.1 Specifying sets of characters | 
|  | growing files | 5.2 tail: Output the last part of files | 
| 
 | 
| H |  |  | 
|---|
|  | head | 5.1 head: Output the first part of files | 
|  | headers, numbering | 3.3 nl: Number lines and write files | 
|  | help, online | 2. Common options | 
|  | hex dump of files | 3.4 od: Write files in octal or other formats | 
| 
 | 
| I |  |  | 
|---|
|  | indenting lines | 4.2 pr: Paginate or columnate files for printing | 
|  | initial part of files, outputting | 5.1 head: Output the first part of files | 
|  | initial tabs, converting | 9.2 expand: Convert tabs to spaces | 
|  | input tabs | 4.2 pr: Paginate or columnate files for printing | 
|  | introduction | 1. Introduction | 
| 
 | 
| J |  |  | 
|---|
|  | join | 8.3 join: Join lines on a common field | 
| 
 | 
| K |  |  | 
|---|
|  | Knuth, Donald E. | 4.1 fmt: Reformat paragraph text | 
| 
 | 
| L |  |  | 
|---|
|  | last part of files, outputting | 5.2 tail: Output the last part of files | 
|  | LC_COLLATE | 7.1 sort: Sort text files | 
|  | LC_COLLATE | 7.3 comm: Compare two sorted files line by line | 
|  | LC_COLLATE | 8.3 join: Join lines on a common field | 
|  | LC_CTYPE | 7.1 sort: Sort text files | 
|  | LC_NUMERIC | 7.1 sort: Sort text files | 
|  | LC_TIME | 7.1 sort: Sort text files | 
|  | left margin | 4.2 pr: Paginate or columnate files for printing | 
|  | line count | 6.1 wc: Print byte, word, and line counts | 
|  | line numbering | 3.3 nl: Number lines and write files | 
|  | line-breaking | 4.1 fmt: Reformat paragraph text | 
|  | line-by-line comparison | 7.3 comm: Compare two sorted files line by line | 
|  | ln format for nl | 3.3 nl: Number lines and write files | 
|  | logical pages, numbering on | 3.3 nl: Number lines and write files | 
|  | lower | 9.1.1 Specifying sets of characters | 
| 
 | 
| M |  |  | 
|---|
|  | md5sum | 6.4 md5sum: Print or check message-digests | 
|  | merging files | 8.2 paste: Merge lines of files | 
|  | merging files in parallel | 4.2 pr: Paginate or columnate files for printing | 
|  | merging sorted files | 7.1 sort: Sort text files | 
|  | message-digest, 128-bit | 6.4 md5sum: Print or check message-digests | 
|  | months, sorting by | 7.1 sort: Sort text files | 
|  | multicolumn output, generating | 4.2 pr: Paginate or columnate files for printing | 
| 
 | 
| N |  |  | 
|---|
|  | name follow option | 5.2 tail: Output the last part of files | 
|  | nl | 3.3 nl: Number lines and write files | 
|  | numbering lines | 3.3 nl: Number lines and write files | 
|  | numeric sort | 7.1 sort: Sort text files | 
| 
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