|  | Index Entry | Section | 
|---|
| 
 | 
| F |  |  | 
|---|
|  | factor | 25.1 factor: Print prime factors | 
|  | failure exit status | 16.1 false: Do nothing, unsuccessfully | 
|  | false | 16.1 false: Do nothing, unsuccessfully | 
|  | fascism | 22.5 su: Run a command with substitute user and group id | 
|  | ffn | 19.2.3 Output settings | 
|  | field separator character | 7.1 sort: Sort text files | 
|  | fields, padding numeric | 21.1.4 Padding | 
|  | FIFOs, creating | 12.4 mkfifo: Make FIFOs (named pipes) | 
|  | file attributes, changing | 13. Changing file attributes | 
|  | file characteristic tests | 16.3.3 File characteristic tests | 
|  | file contents, dumping unambiguously | 3.4 od: Write files in octal or other formats | 
|  | file information, preserving | 11.1 cp: Copy files and directories | 
|  | file information, preserving | 11.1 cp: Copy files and directories | 
|  | file name manipulation | 18. File name manipulation | 
|  | file name pattern expansion, disabled | 22.5 su: Run a command with substitute user and group id | 
|  | file names, checking validity and portability | 18.3 pathchk: Check file name portability | 
|  | file names, stripping directory and suffix | 18.1 basename: Strip directory and suffix from a file name | 
|  | file offset radix | 3.4 od: Write files in octal or other formats | 
|  | file ownership, changing | 13.1 chown: Change file owner and group | 
|  | file permissions, numeric | 26.3 Numeric Modes | 
|  | file sizes | 14.2 du: Estimate file space usage | 
|  | file space usage | 14.2 du: Estimate file space usage | 
|  | file status | 14.3 stat: Report file or filesystem status | 
|  | file timestamps, changing | 13.4 touch: Change file timestamps | 
|  | file type and executables, marking | 10.1.5 General output formatting | 
|  | file type tests | 16.3.1 File type tests | 
|  | file type, marking | 10.1.5 General output formatting | 
|  | file types | 12. Special file types | 
|  | file types, special | 12. Special file types | 
|  | file utilities |  | 
|  | files beginning with `-', removing | 11.5 rm: Remove files or directories | 
|  | files, copying | 11.1 cp: Copy files and directories | 
|  | filesystem disk usage | 14.1 df: Report filesystem disk space usage | 
|  | filesystem sizes | 14.1 df: Report filesystem disk space usage | 
|  | filesystem space, retrieving current data more slowly | 14.1 df: Report filesystem disk space usage | 
|  | filesystem space, retrieving old data more quickly | 14.1 df: Report filesystem disk space usage | 
|  | filesystem status | 14.3 stat: Report file or filesystem status | 
|  | filesystem types, limiting output to certain | 14.1 df: Report filesystem disk space usage | 
|  | filesystem types, limiting output to certain | 14.1 df: Report filesystem disk space usage | 
|  | filesystem types, printing | 14.1 df: Report filesystem disk space usage | 
|  | filesystems | 14.3 stat: Report file or filesystem status | 
|  | filesystems and hard links | 12.2 ln: Make links between files | 
|  | filesystems, omitting copying to different | 11.1 cp: Copy files and directories | 
|  | fingerprint, 128-bit | 6.4 md5sum: Print or check message-digests | 
|  | first in date strings | 27.1 General date syntax | 
|  | first part of files, outputting | 5.1 head: Output the first part of files | 
|  | flow control, hardware | 19.2.1 Control settings | 
|  | flow control, software | 19.2.2 Input settings | 
|  | flushing, disabling | 19.2.4 Local settings | 
|  | 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 | 
|  | force deletion | 11.6 shred: Remove files more securely | 
|  | formatting file contents | 4. Formatting file contents | 
|  | formatting of numbers in seq | 25.2 seq: Print numeric sequences | 
|  | formatting times | 4.2 pr: Paginate or columnate files for printing | 
|  | formatting times | 21.1 date: Print or set system date and time | 
|  | fortnight in date strings | 27.6 Relative items in date strings | 
|  | fsck | 11.5 rm: Remove files or directories | 
| 
 | 
| G |  |  | 
|---|
|  | general date syntax | 27.1 General date syntax | 
|  | general numeric sort | 7.1 sort: Sort text files | 
|  | getdate | 27. Date input formats | 
|  | gibibyte, definition of | 2.2 Block size | 
|  | gigabyte, definition of | 2.2 Block size | 
|  | giving away permissions | 26.2.6 The Umask and Protection | 
|  | globbing, disabled | 22.5 su: Run a command with substitute user and group id | 
|  | GMT | 21.1.6 Options for date | 
|  | grand total of disk space | 14.2 du: Estimate file space usage | 
|  | graph | 9.1.1 Specifying sets of characters | 
|  | Greenwich Mean Time | 21.1.6 Options for date | 
|  | group owner, default | 26.1 Structure of File Permissions | 
|  | group ownership of installed files, setting | 11.3 install: Copy files and set attributes | 
|  | group ownership, changing | 13.1 chown: Change file owner and group | 
|  | group ownership, changing | 13.2 chgrp: Change group ownership | 
|  | group wheel, not supported | 22.5 su: Run a command with substitute user and group id | 
|  | group, permissions for | 26.2.1 Setting Permissions | 
|  | groups | 20.4 groups: Print group names a user is in | 
|  | growing files | 5.2 tail: Output the last part of files | 
| 
 | 
| H |  |  | 
|---|
|  | hangups, immunity to | 22.4 nohup: Run a command immune to hangups | 
|  | hard link check | 16.3.3 File characteristic tests | 
|  | hard link, defined | 12.2 ln: Make links between files | 
|  | hard links to directories | 12.2 ln: Make links between files | 
|  | hard links, counting in du | 14.2 du: Estimate file space usage | 
|  | hard links, creating | 12.1 link: Make a hard link via the link syscall | 
|  | hard links, creating | 12.2 ln: Make links between files | 
|  | hard links, preserving | 11.1 cp: Copy files and directories | 
|  | hardware class | 21.2 uname: Print system information | 
|  | hardware flow control | 19.2.1 Control settings | 
|  | hardware platform | 21.2 uname: Print system information | 
|  | hardware type | 21.2 uname: Print system information | 
|  | hat notation for control characters | 19.2.4 Local settings | 
|  | 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 | 
|  | High Sierra filesystem | 14.1 df: Report filesystem disk space usage | 
|  | holes, copying files with | 11.1 cp: Copy files and directories | 
|  | HOME | 22.5 su: Run a command with substitute user and group id | 
|  | horizontal, listing files | 10.1.5 General output formatting | 
|  | host processor type | 21.2 uname: Print system information | 
|  | hostid | 21.4 hostid: Print numeric host identifier. | 
|  | hostname | 21.3 hostname: Print or set system name | 
|  | hour in date strings | 27.6 Relative items in date strings | 
|  | hsfs filesystem type | 14.1 df: Report filesystem disk space usage | 
|  | human-readable output | 2.2 Block size | 
|  | human-readable output | 10.1.2 What information is listed | 
|  | human-readable output | 14.1 df: Report filesystem disk space usage | 
|  | human-readable output | 14.2 du: Estimate file space usage | 
|  | hup[cl] | 19.2.1 Control settings | 
|  | hurd, author, printing | 10.1.2 What information is listed | 
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