| Index Entry |  Section | 
 
  | 
| E |  |  | 
 | ebcdic, converting to | 6.2 dd: Convert and copy a file | 
 | efs filesystem type | 9.1 df: Report filesystem disk space usage | 
 | Eggert, Paul | 4.8 Authors of getdate | 
 | empty files, creating | 8.4 touch: Change file timestamps | 
 | epoch, for POSIX | 4. Date input formats | 
 | erasing data | 6.6 shred: Remove files more securely | 
 | error messages, omitting | 8.1 chown: Change file owner and group | 
 | error messages, omitting | 8.2 chgrp: Change group ownership | 
 | error messages, omitting | 8.3 chmod: Change access permissions | 
 | excluding files from du | 9.2 du: Estimate file space usage | 
 | excluding files from du | 9.2 du: Estimate file space usage | 
 | executables and file type, marking | 5.1.5 General output formatting | 
 | execute permission | 3.1 Structure of File Permissions | 
 | execute permission, symbolic | 3.2.1 Setting Permissions | 
 | existing backup method | 2.1 Backup options | 
 | extension, sorting files by | 5.1.3 Sorting the output | 
 
  | 
| F |  |  | 
 | FIFOs, creating | 7.3 mkfifo: Make FIFOs (named pipes) | 
 | file attributes, changing | 8. Changing file attributes | 
 | file information, preserving | 6.1 cp: Copy files and directories | 
 | file ownership, changing | 8.1 chown: Change file owner and group | 
 | file permissions | 3. File permissions | 
 | file permissions, numeric | 3.3 Numeric Modes | 
 | file space usage | 9.2 du: Estimate file space usage | 
 | file timestamps, changing | 8.4 touch: Change file timestamps | 
 | file type and executables, marking | 5.1.5 General output formatting | 
 | file type, marking | 5.1.5 General output formatting | 
 | file types | 7. Special file types | 
 | file types, special | 7. Special file types | 
 | file utilities |  | 
 | files beginning with `-', removing | 6.5 rm: Remove files or directories | 
 | files, copying | 6.1 cp: Copy files and directories | 
 | filesystem disk usage | 9.1 df: Report filesystem disk space usage | 
 | filesystem space, retrieving current data more slowly | 9.1 df: Report filesystem disk space usage | 
 | filesystem space, retrieving old data more quickly | 9.1 df: Report filesystem disk space usage | 
 | filesystem types, limiting output to certain | 9.1 df: Report filesystem disk space usage | 
 | filesystem types, limiting output to certain | 9.1 df: Report filesystem disk space usage | 
 | filesystem types, printing | 9.1 df: Report filesystem disk space usage | 
 | filesystems and hard links | 7.1 ln: Make links between files | 
 | filesystems, omitting copying to different | 6.1 cp: Copy files and directories | 
 | first in date strings | 4.1 General date syntax | 
 | force deletion | 6.6 shred: Remove files more securely | 
 | fortnight in date strings | 4.6 Relative items in date strings | 
 | fsck | 6.5 rm: Remove files or directories | 
 
  | 
| G |  |  | 
 | general date syntax | 4.1 General date syntax | 
 | getdate | 4. Date input formats | 
 | giving away permissions | 3.2.6 The Umask and Protection | 
 | grand total of disk space | 9.2 du: Estimate file space usage | 
 | group owner, default | 3.1 Structure of File Permissions | 
 | group ownership of installed files, setting | 6.3 install: Copy files and set attributes | 
 | group ownership, changing | 8.1 chown: Change file owner and group | 
 | group ownership, changing | 8.2 chgrp: Change group ownership | 
 | group, permissions for | 3.2.1 Setting Permissions | 
 
  | 
| H |  |  | 
 | hard link, defined | 7.1 ln: Make links between files | 
 | hard links to directories | 7.1 ln: Make links between files | 
 | hard links, counting in du | 9.2 du: Estimate file space usage | 
 | hard links, creating | 7.1 ln: Make links between files | 
 | hard links, preserving | 6.1 cp: Copy files and directories | 
 | help, online | 2. Common options | 
 | High Sierra filesystem | 9.1 df: Report filesystem disk space usage | 
 | history | 1. Introduction | 
 | holes, copying files with | 6.1 cp: Copy files and directories | 
 | horizontal, listing files | 5.1.5 General output formatting | 
 | hour in date strings | 4.6 Relative items in date strings | 
 | hsfs filesystem type | 9.1 df: Report filesystem disk space usage | 
 | human-readable output | 2.2 Block size | 
 | human-readable output | 5.1.2 What information is listed | 
 | human-readable output | 9.1 df: Report filesystem disk space usage | 
 | human-readable output | 9.2 du: Estimate file space usage | 
 
  | 
| I |  |  | 
 | ibs | 6.2 dd: Convert and copy a file | 
 | if | 6.2 dd: Convert and copy a file | 
 | ignore filesystems | 9.1 df: Report filesystem disk space usage | 
 | inode number, printing | 5.1.2 What information is listed | 
 | inode usage | 9.1 df: Report filesystem disk space usage | 
 | inode, and hard links | 7.1 ln: Make links between files | 
 | inodes, written buffered | 9.3 sync: Synchronize data on disk with memory | 
 | input block size | 6.2 dd: Convert and copy a file | 
 | install | 6.3 install: Copy files and set attributes | 
 | introduction | 1. Introduction | 
 | ISO 8601 date format | 4.2 Calendar date items | 
 | items in date strings | 4.1 General date syntax | 
 | iterations, selecting the number of | 6.6 shred: Remove files more securely | 
 
  | 
| K |  |  | 
 | kilobytes for filesystem sizes | 9.1 df: Report filesystem disk space usage | 
 
  | 
| L |  |  | 
 | language, in dates | 4.1 General date syntax | 
 | language, in dates | 4.1 General date syntax | 
 | last day | 4.5 Day of week items | 
 | last in date strings | 4.1 General date syntax | 
 | lcase, converting to | 6.2 dd: Convert and copy a file | 
 | lchown | 8.1 chown: Change file owner and group | 
 | lchown | 8.1 chown: Change file owner and group | 
 | lchown | 8.2 chgrp: Change group ownership | 
 | lchown | 8.2 chgrp: Change group ownership | 
 | leading directories, creating missing | 6.3 install: Copy files and set attributes | 
 | limiting output of du | 9.2 du: Estimate file space usage | 
 | links, creating | 7.1 ln: Make links between files | 
 | Linux filesystem types | 9.1 df: Report filesystem disk space usage | 
 | ln | 7.1 ln: Make links between files | 
 | local filesystem types | 9.1 df: Report filesystem disk space usage | 
 | long ls format | 5.1.2 What information is listed | 
 | ls | 5.1 ls: List directory contents | 
 | LS_BLOCK_SIZE | 2.2 Block size | 
 | LS_COLORS | 5.4 dircolors: Color setup for ls | 
 
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