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| . |  |  | 
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|  | .cshrc | 22.5 su: Run a command with substitute user and group id | 
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| / |  |  | 
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|  | / | 16.4.2 Numeric expressions | 
|  | /bin/sh | 22.5 su: Run a command with substitute user and group id | 
|  | /etc/passwd | 22.5 su: Run a command with substitute user and group id | 
|  | /etc/shells | 22.5 su: Run a command with substitute user and group id | 
|  | /etc/utmp | 20.2 logname: Print current login name | 
|  | /etc/utmp | 20.5 users: Print login names of users currently logged in | 
|  | /etc/utmp | 20.6 who: Print who is currently logged in | 
|  | /etc/wtmp | 20.5 users: Print login names of users currently logged in | 
|  | /etc/wtmp | 20.6 who: Print who is currently logged in | 
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| 1 |  |  | 
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|  | 128-bit checksum | 6.4 md5sum: Print or check message-digests | 
|  | 16-bit checksum | 6.2 sum: Print checksum and block counts | 
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| 4 |  |  | 
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|  | 4.2 filesystem type | 14.1 df: Report filesystem disk space usage | 
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| < |  |  | 
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|  | < | 16.4.3 Relations for expr | 
|  | <= | 16.4.3 Relations for expr | 
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| = |  |  | 
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|  | = | 16.4.3 Relations for expr | 
|  | == | 16.4.3 Relations for expr | 
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| > |  |  | 
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|  | > | 16.4.3 Relations for expr | 
|  | >= | 16.4.3 Relations for expr | 
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| \ |  |  | 
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|  | \( regexp operator | 16.4.1 String expressions | 
|  | \+ regexp operator | 16.4.1 String expressions | 
|  | \0ooo | 15.2 printf: Format and print data | 
|  | \? regexp operator | 16.4.1 String expressions | 
|  | \c | 15.2 printf: Format and print data | 
|  | \uhhhh | 15.2 printf: Format and print data | 
|  | \Uhhhhhhhh | 15.2 printf: Format and print data | 
|  | \xhh | 15.2 printf: Format and print data | 
|  | \| regexp operator | 16.4.1 String expressions | 
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| _ |  |  | 
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|  | _POSIX2_VERSION | 2.5 Standards conformance | 
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| | |  |  | 
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|  | | | 16.4.3 Relations for expr | 
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| A |  |  | 
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|  | abbreviations for months | 27.2 Calendar date items | 
|  | access permission tests | 16.3.2 Access permission tests | 
|  | access permissions, changing | 13.3 chmod: Change access permissions | 
|  | access time, changing | 13.4 touch: Change file timestamps | 
|  | access time, printing or sorting files by | 10.1.3 Sorting the output | 
|  | across columns | 4.2 pr: Paginate or columnate files for printing | 
|  | across, listing files | 10.1.5 General output formatting | 
|  | adding permissions | 26.2.1 Setting Permissions | 
|  | addition | 16.4.2 Numeric expressions | 
|  | ago in date strings | 27.6 Relative items in date strings | 
|  | 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 | 
|  | alternate ebcdic, converting to | 11.2 dd: Convert and copy a file | 
|  | always color option | 10.1.5 General output formatting | 
|  | am i | 20.6 who: Print who is currently logged in | 
|  | am in date strings | 27.3 Time of day items | 
|  | and operator | 16.3.6 Connectives for test | 
|  | and operator | 16.4.3 Relations for expr | 
|  | appropriate privileges | 11.3 install: Copy files and set attributes | 
|  | appropriate privileges | 21.1.5 Setting the time | 
|  | appropriate privileges | 21.3 hostname: Print or set system name | 
|  | appropriate privileges | 22.3 nice: Run a command with modified scheduling priority | 
|  | arbitrary date strings, parsing | 21.1.6 Options for date | 
|  | arbitrary text, displaying | 15.1 echo: Print a line of text | 
|  | arithmetic tests | 16.3.5 Numeric tests | 
|  | ASCII dump of files | 3.4 od: Write files in octal or other formats | 
|  | ascii, converting to | 11.2 dd: Convert and copy a file | 
|  | atime, changing | 13.4 touch: Change file timestamps | 
|  | atime, printing or sorting files by | 10.1.3 Sorting the output | 
|  | attributes, file | 13. Changing file attributes | 
|  | authors of getdate | 27.8 Authors of getdate | 
|  | auto color option | 10.1.5 General output formatting | 
|  | automounter filesystems | 14.1 df: Report filesystem disk space usage | 
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| B |  |  | 
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|  | b for block special file | 12.5 mknod: Make block or character special files | 
|  | background jobs, stopping at terminal write | 19.2.4 Local settings | 
|  | backslash escapes | 9.1.1 Specifying sets of characters | 
|  | backslash escapes | 15.1 echo: Print a line of text | 
|  | backslash sequences for file names | 10.1.7 Formatting the file names | 
|  | backup files, ignoring | 10.1.1 Which files are listed | 
|  | backup options | 2.1 Backup options | 
|  | backup suffix | 2.1 Backup options | 
|  | backups, making | 2.1 Backup options | 
|  | backups, making | 11.1 cp: Copy files and directories | 
|  | backups, making | 11.3 install: Copy files and set attributes | 
|  | backups, making | 11.4 mv: Move (rename) files | 
|  | backups, making | 12.2 ln: Make links between files | 
|  | backups, making only | 11.1 cp: Copy files and directories | 
|  | basename | 18.1 basename: Strip directory and suffix from a file name | 
|  | baud rate, setting | 19.2.7 Special settings | 
|  | beeping at input buffer full | 19.2.2 Input settings | 
|  | beginning of time | 21.1.1 Time directives | 
|  | beginning of time, for POSIX | 27. Date input formats | 
|  | Bellovin, Steven M. | 27.8 Authors of getdate | 
|  | Berets, Jim | 27.8 Authors of getdate | 
|  | Berry, K. | 1. Introduction | 
|  | Berry, K. | 27.8 Authors of getdate | 
|  | 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 | 
|  | block (space-padding) | 11.2 dd: Convert and copy a file | 
|  | block size | 2.2 Block size | 
|  | block size | 11.2 dd: Convert and copy a file | 
|  | block size of conversion | 11.2 dd: Convert and copy a file | 
|  | block size of input | 11.2 dd: Convert and copy a file | 
|  | block size of output | 11.2 dd: Convert and copy a file | 
|  | block special check | 16.3.1 File type tests | 
|  | block special files | 12.5 mknod: Make block or character special files | 
|  | block special files, creating | 12.5 mknod: Make block or character special files | 
|  | BLOCK_SIZE | 2.2 Block size | 
|  | body, numbering | 3.3 nl: Number lines and write files | 
|  | Bourne shell syntax for color setup | 10.4 dircolors: Color setup forls | 
|  | breaks, cause interrupts | 19.2.2 Input settings | 
|  | breaks, ignoring | 19.2.2 Input settings | 
|  | brkint | 19.2.2 Input settings | 
|  | bs | 11.2 dd: Convert and copy a file | 
|  | BSD sum | 6.2 sum: Print checksum and block counts | 
|  | BSD tail | 5.2 tail: Output the last part of files | 
|  | BSD touchcompatibility | 13.4 touch: Change file timestamps | 
|  | bsn | 19.2.3 Output settings | 
|  | bugs, reporting | 1. Introduction | 
|  | built-in shell commands, conflicts with | 16.3 test: Check file types and compare values | 
|  | built-in shell commands, conflicts with | 19.1 pwd: Print working directory | 
|  | built-in shell commands, conflicts with | 22.3 nice: Run a command with modified scheduling priority | 
|  | byte count | 6.1 wc: Print byte, word, and line counts | 
|  | byte-swapping | 11.2 dd: Convert and copy a file | 
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