| Index Entry |  Section | 
 
  | 
| C |  |  | 
 | c for character special file | 12.5 mknod: Make block or character special files | 
 | C shell syntax for color setup | 10.4 dircolors: Color setup for ls | 
 | C-s/C-q flow control | 19.2.2 Input settings | 
 | calendar date item | 27.2 Calendar date items | 
 | case folding | 7.1 sort: Sort text files | 
 | case translation | 19.2.4 Local settings | 
 | case, ignored in dates | 27.1 General date syntax | 
 | cat | 3.1 cat: Concatenate and write files | 
 | cbreak | 19.2.5 Combination settings | 
 | cbs | 11.2 dd: Convert and copy a file | 
 | CD-ROM filesystem type | 14.1 df: Report filesystem disk space usage | 
 | cdfs filesystem type | 14.1 df: Report filesystem disk space usage | 
 | change or print terminal settings | 19.2 stty: Print or change terminal characteristics | 
 | changed files, verbosely describing | 13.2 chgrp: Change group ownership | 
 | changed owners, verbosely describing | 13.1 chown: Change file owner and group | 
 | changing access permissions | 13.3 chmod: Change access permissions | 
 | changing file attributes | 13. Changing file attributes | 
 | changing file ownership | 13.1 chown: Change file owner and group | 
 | changing file timestamps | 13.4 touch: Change file timestamps | 
 | changing group ownership | 13.1 chown: Change file owner and group | 
 | changing group ownership | 13.2 chgrp: Change group ownership | 
 | changing special permissions | 26.2.3 Changing Special Permissions | 
 | character classes | 9.1.1 Specifying sets of characters | 
 | character count | 6.1 wc: Print byte, word, and line counts | 
 | character size | 19.2.1 Control settings | 
 | character special check | 16.3.1 File type tests | 
 | character special files | 12.5 mknod: Make block or character special files | 
 | character special files, creating | 12.5 mknod: Make block or character special files | 
 | characters, special | 19.2.6 Special characters | 
 | check file types | 16.3 test: Check file types and compare values | 
 | 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 | 
 | chgrp | 13.2 chgrp: Change group ownership | 
 | chmod | 13.3 chmod: Change access permissions | 
 | chown | 13.1 chown: Change file owner and group | 
 | chroot | 22.1 chroot: Run a command with a different root directory | 
 | cksum | 6.3 cksum: Print CRC checksum and byte counts | 
 | clocal | 19.2.1 Control settings | 
 | cntrl | 9.1.1 Specifying sets of characters | 
 | color database, printing | 10.4 dircolors: Color setup for ls | 
 | color setup | 10.4 dircolors: Color setup for ls | 
 | color, distinguishing file types with | 10.1.5 General output formatting | 
 | cols | 19.2.7 Special settings | 
 | COLUMNS | 10.1.5 General output formatting | 
 | columns | 19.2.7 Special settings | 
 | COLUMNS | 19.2.7 Special settings | 
 | combination settings | 19.2.5 Combination settings | 
 | comm | 7.3 comm: Compare two sorted files line by line | 
 | commands for controlling processes | 23. Process control | 
 | commands for delaying | 24. Delaying | 
 | commands for exit status | 16. Conditions | 
 | commands for file name manipulation | 18. File name manipulation | 
 | commands for invoking other commands | 22. Modified command invocation | 
 | commands for printing text | 15. Printing text | 
 | commands for printing the working context | 19. Working context | 
 | commands for printing user information | 20. User information | 
 | commands for redirection | 17. Redirection | 
 | commands for system context | 21. System context | 
 | commas, outputting between files | 10.1.5 General output formatting | 
 | comments, in dates | 27.1 General date syntax | 
 | 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 | 
 | compare values | 16.3 test: Check file types and compare values | 
 | comparing sorted files | 7.3 comm: Compare two sorted files line by line | 
 | comparison operators | 16.4.3 Relations for expr | 
 | concatenate and write files | 3.1 cat: Concatenate and write files | 
 | conditional executability | 26.2.4 Conditional Executability | 
 | conditions | 16. Conditions | 
 | conflicts with shell built-ins | 16.3 test: Check file types and compare values | 
 | conflicts with shell built-ins | 19.1 pwd: Print working directory | 
 | conflicts with shell built-ins | 22.3 nice: Run a command with modified scheduling priority | 
 | connectives, logical | 16.3.6 Connectives for test | 
 | connectives, logical | 16.4.3 Relations for expr | 
 | context splitting | 5.4 csplit: Split a file into context-determined pieces | 
 | context, system | 21. System context | 
 | control characters, using `^c' | 19.2.4 Local settings | 
 | control settings | 19.2.1 Control settings | 
 | conv | 11.2 dd: Convert and copy a file | 
 | conversion block size | 11.2 dd: Convert and copy a file | 
 | converting tabs to spaces | 9.2 expand: Convert tabs to spaces | 
 | converting while copying a file | 11.2 dd: Convert and copy a file | 
 | cooked | 19.2.5 Combination settings | 
 | Coordinated Universal Time | 21.1.6 Options for date | 
 | copying directories recursively | 11.1 cp: Copy files and directories | 
 | copying directories recursively | 11.1 cp: Copy files and directories | 
 | copying existing permissions | 26.2.2 Copying Existing Permissions | 
 | copying files | 3.1 cat: Concatenate and write files | 
 | copying files and directories | 11.1 cp: Copy files and directories | 
 | copying files and setting attributes | 11.3 install: Copy files and set attributes | 
 | count | 11.2 dd: Convert and copy a file | 
 | cp | 11.1 cp: Copy files and directories | 
 | crashes and corruption | 14.4 sync: Synchronize data on disk with memory | 
 | CRC checksum | 6.3 cksum: Print CRC checksum and byte counts | 
 | cread | 19.2.1 Control settings | 
 | creating directories | 12.3 mkdir: Make directories | 
 | creating FIFOs (named pipes) | 12.4 mkfifo: Make FIFOs (named pipes) | 
 | creating links (hard only) | 12.1 link: Make a hard link via the link syscall | 
 | creating links (hard or soft) | 12.2 ln: Make links between files | 
 | crn | 19.2.3 Output settings | 
 | crown margin | 4.1 fmt: Reformat paragraph text | 
 | crt | 19.2.5 Combination settings | 
 | crterase | 19.2.4 Local settings | 
 | crtkill | 19.2.4 Local settings | 
 | crtscts | 19.2.1 Control settings | 
 | csh syntax for color setup | 10.4 dircolors: Color setup for ls | 
 | csn | 19.2.1 Control settings | 
 | csplit | 5.4 csplit: Split a file into context-determined pieces | 
 | cstopb | 19.2.1 Control settings | 
 | ctime, printing or sorting by | 10.1.3 Sorting the output | 
 | ctlecho | 19.2.4 Local settings | 
 | current working directory, printing | 19.1 pwd: Print working directory | 
 | cut | 8.1 cut: Print selected parts of lines | 
 | cyclic redundancy check | 6.3 cksum: Print CRC checksum and byte counts | 
 
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