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Index: Q -- S

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Index Entry Section

Q
quit19.2.6 Special characters
quoting style10.1.7 Formatting the file names

R
radix for file offsets3.4 od: Write files in octal or other formats
random sort7.1 sort: Sort text files
random source for shredding11.6 shred: Remove files more securely
random source for shuffling7.2 shuf: Shuffling text
random source for sorting7.1 sort: Sort text files
random sources2.6 Sources of random data
ranges9.1.1 Specifying sets of characters
raw19.2.5 Combination settings
read errors, ignoring11.2 dd: Convert and copy a file
read from stdin and write to stdout and files17.1 tee: Redirect output to multiple files or processes
read permission27.1 Structure of File Mode Bits
read permission, symbolic27.2.1 Setting Permissions
read system call, and holes11.1 cp: Copy files and directories
readable file check16.3.2 Access permission tests
readlink12.6 readlink: Print value of a symlink or canonical file name
real user and group IDs, printing20.1 id: Print user identity
realpath12.6 readlink: Print value of a symlink or canonical file name
recursive directory listing10.1.1 Which files are listed
recursively changing access permissions13.3 chmod: Change access permissions
recursively changing file ownership13.1 chown: Change file owner and group
recursively changing group ownership13.2 chgrp: Change group ownership
recursively copying directories11.1 cp: Copy files and directories
recursively copying directories11.1 cp: Copy files and directories
redirection17. Redirection
reference file22.1 chcon: Change SELinux context of file
reformatting paragraph text4.1 fmt: Reformat paragraph text
regular expression matching16.4.1 String expressions
regular file check16.3.1 File type tests
relations, numeric or string16.4.3 Relations for expr
relative items in date strings28.6 Relative items in date strings
release of kernel21.4 uname: Print system information
remainder16.4.2 Numeric expressions
remote hostname20.6 who: Print who is currently logged in
removing empty directories12.7 rmdir: Remove empty directories
removing files after shredding11.6 shred: Remove files more securely
removing files or directories11.5 rm: Remove files or directories
removing files or directories (via the unlink syscall)12.8 unlink: Remove files via the unlink syscall
removing permissions27.2.1 Setting Permissions
repeated characters9.1.1 Specifying sets of characters
repeated lines, outputting7.3 uniq: Uniquify files
repeated output of a string15.3 yes: Print a string until interrupted
restricted deletion flag27.1 Structure of File Mode Bits
restricted shell23.6 su: Run a command with substitute user and group ID
return, ignoring19.2.2 Input settings
return, translating to newline19.2.2 Input settings
return, translating to newline19.2.3 Output settings
reverse sorting7.1 sort: Sort text files
reverse sorting10.1.3 Sorting the output
reversing files3.2 tac: Concatenate and write files in reverse
rm11.5 rm: Remove files or directories
rmdir12.7 rmdir: Remove empty directories
rn format for nl3.3 nl: Number lines and write files
root as default owner11.3 install: Copy files and set attributes
root directory, allow recursive destruction11.5 rm: Remove files or directories
root directory, allow recursive modification13.1 chown: Change file owner and group
root directory, allow recursive modification13.2 chgrp: Change group ownership
root directory, allow recursive modification13.3 chmod: Change access permissions
root directory, disallow recursive destruction11.5 rm: Remove files or directories
root directory, disallow recursive modification13.1 chown: Change file owner and group
root directory, disallow recursive modification13.2 chgrp: Change group ownership
root directory, disallow recursive modification13.3 chmod: Change access permissions
root directory, running a program in a specified23.1 chroot: Run a command with a different root directory
root, becoming23.6 su: Run a command with substitute user and group ID
rows19.2.7 Special settings
rprnt19.2.6 Special characters
RTS/CTS flow control19.2.1 Control settings
run commands with bounded time23.7 timeout: Run a command with a time limit
run with security context22.2 runcon: Run a command in specified SELinux context
runcon22.2 runcon: Run a command in specified SELinux context
running a program in a modified environment23.2 env: Run a command in a modified environment
running a program in a specified root directory23.1 chroot: Run a command with a different root directory
rz format for nl3.3 nl: Number lines and write files

S
Salz, Rich28.10 Authors of get_date
same file check16.3.3 File characteristic tests
sane19.2.5 Combination settings
scheduling, affecting23.3 nice: Run a command with modified niceness
screen columns4.3 fold: Wrap input lines to fit in specified width
seconds since the epoch21.1.1 Time conversion specifiers
section delimiters of pages3.3 nl: Number lines and write files
security context10.1.2 What information is listed
security context11.3 install: Copy files and set attributes
security context11.3 install: Copy files and set attributes
security context12.3 mkdir: Make directories
security context12.4 mkfifo: Make FIFOs (named pipes)
security context12.5 mknod: Make block or character special files
security context20.1 id: Print user identity
seek11.2 dd: Convert and copy a file
self-backups11.1 cp: Copy files and directories
SELinux10.1.2 What information is listed
SELinux11.3 install: Copy files and set attributes
SELinux11.3 install: Copy files and set attributes
SELinux12.3 mkdir: Make directories
SELinux12.4 mkfifo: Make FIFOs (named pipes)
SELinux12.5 mknod: Make block or character special files
SELinux20.1 id: Print user identity
SELinux context22. SELinux context
SELinux, context22. SELinux context
send a signal to processes24.1 kill: Send a signal to processes
sentences and line-breaking4.1 fmt: Reformat paragraph text
separator for numbers in seq26.2 seq: Print numeric sequences
seq26.2 seq: Print numeric sequences
sequence of numbers26.2 seq: Print numeric sequences
set-group-ID27.1 Structure of File Mode Bits
set-group-ID check16.3.2 Access permission tests
set-user-ID27.1 Structure of File Mode Bits
set-user-ID check16.3.2 Access permission tests
setgid27.1 Structure of File Mode Bits
setting permissions27.2.1 Setting Permissions
setting the hostname21.5 hostname: Print or set system name
setting the time21.1.5 Setting the time
setuid27.1 Structure of File Mode Bits
setup for color10.4 dircolors: Color setup for ls
sh syntax for color setup10.4 dircolors: Color setup for ls
SHA-16.5 sha1sum: Print or check SHA-1 digests
SHA-26.6 sha2 utilities: Print or check SHA-2 digests
sha1sum6.5 sha1sum: Print or check SHA-1 digests
sha224sum6.6 sha2 utilities: Print or check SHA-2 digests
sha256sum6.6 sha2 utilities: Print or check SHA-2 digests
sha384sum6.6 sha2 utilities: Print or check SHA-2 digests
sha512sum6.6 sha2 utilities: Print or check SHA-2 digests
SHELL23.6 su: Run a command with substitute user and group ID
SHELL environment variable, and color10.4 dircolors: Color setup for ls
shell utilitiesGNU Coreutils
shred11.6 shred: Remove files more securely
shuf7.2 shuf: Shuffling text
shuffling files7.2 shuf: Shuffling text
SI output2.3 Block size
SI output10.1.2 What information is listed
SI output14.1 df: Report file system disk space usage
SI output14.2 du: Estimate file space usage
signals, specifying2.4 Signal specifications
simple backup method2.2 Backup options
SIMPLE_BACKUP_SUFFIX2.2 Backup options
single-column output of files10.1.5 General output formatting
size19.2.7 Special settings
size for main memory sorting7.1 sort: Sort text files
size of file to shred11.6 shred: Remove files more securely
size of files, reporting10.1.2 What information is listed
size of files, sorting files by10.1.3 Sorting the output
skip11.2 dd: Convert and copy a file
sleep25.1 sleep: Delay for a specified time
socket check16.3.1 File type tests
software flow control19.2.2 Input settings
sort7.1 sort: Sort text files
sort field7.1 sort: Sort text files
sort stability7.1 sort: Sort text files
sort stability7.1 sort: Sort text files
sort's last-resort comparison7.1 sort: Sort text files
sort's last-resort comparison7.1 sort: Sort text files
sorted files, operations on7. Operating on sorted files
sorting files7.1 sort: Sort text files
sorting ls output10.1.3 Sorting the output
space9.1.1 Specifying sets of characters
sparse files, copying11.1 cp: Copy files and directories
sparse files, creating14.5 truncate: Shrink or extend the size of a file
special characters19.2.6 Special characters
special file types12. Special file types
special file types12. Special file types
special files12.5 mknod: Make block or character special files
special settings19.2.7 Special settings
specifying sets of characters9.1.1 Specifying sets of characters
speed19.2.7 Special settings
split5.3 split: Split a file into fixed-size pieces
splitting a file into pieces5.3 split: Split a file into fixed-size pieces
splitting a file into pieces by context5.4 csplit: Split a file into context-determined pieces
squeezing empty lines3.1 cat: Concatenate and write files
squeezing repeat characters9.1.3 Squeezing repeats and deleting
Stallman, R.1. Introduction
standard input2. Common options
standard output2. Common options
standard streams, buffering23.5 stdbuf: Run a command with modified I/O stream buffering
start19.2.6 Special characters
stat14.3 stat: Report file or file system status
status11.2 dd: Convert and copy a file
status time, printing or sorting by10.1.3 Sorting the output
status time, show the most recent14.2 du: Estimate file space usage
stdbuf23.5 stdbuf: Run a command with modified I/O stream buffering
sticky27.1 Structure of File Mode Bits
sticky bit check16.3.2 Access permission tests
stop19.2.6 Special characters
stop bits19.2.1 Control settings
strftime and date21.1 date: Print or set system date and time
string constants, outputting3.4 od: Write files in octal or other formats
string expressions16.4.1 String expressions
string tests16.3.4 String tests
strip directory and suffix from file names18.1 basename: Strip directory and suffix from a file name
stripping non-directory suffix18.2 dirname: Strip non-directory suffix from a file name
stripping symbol table information11.3 install: Copy files and set attributes
stripping trailing slashes11.1 cp: Copy files and directories
stripping trailing slashes11.4 mv: Move (rename) files
stty19.2 stty: Print or change terminal characteristics
su23.6 su: Run a command with substitute user and group ID
substitute user and group IDs23.6 su: Run a command with substitute user and group ID
substr16.4.1 String expressions
subtracting permissions27.2.1 Setting Permissions
subtraction16.4.2 Numeric expressions
successful exit16.2 true: Do nothing, successfully
suffix, stripping from file names18.1 basename: Strip directory and suffix from a file name
sum6.2 sum: Print checksum and block counts
summarizing files6. Summarizing files
super-user, becoming23.6 su: Run a command with substitute user and group ID
superblock, writing14.4 sync: Synchronize data on disk with memory
supplementary groups, printing20.4 groups: Print group names a user is in
susp19.2.6 Special characters
swab (byte-swapping)11.2 dd: Convert and copy a file
swap space, saving text image in27.1 Structure of File Mode Bits
swtch19.2.6 Special characters
symbol table information, stripping11.3 install: Copy files and set attributes
symbol table information, stripping, program11.3 install: Copy files and set attributes
symbolic (soft) links, creating12.2 ln: Make links between files
symbolic link check16.3.1 File type tests
symbolic link to directory, controlling traversal of2.9 Traversing symlinks
symbolic link to directory, never traverse2.9 Traversing symlinks
symbolic link to directory, never traverse13.1 chown: Change file owner and group
symbolic link to directory, never traverse13.2 chgrp: Change group ownership
symbolic link to directory, never traverse22.1 chcon: Change SELinux context of file
symbolic link to directory, traverse each that is encountered2.9 Traversing symlinks
symbolic link to directory, traverse each that is encountered13.1 chown: Change file owner and group
symbolic link to directory, traverse each that is encountered13.2 chgrp: Change group ownership
symbolic link to directory, traverse each that is encountered22.1 chcon: Change SELinux context of file
symbolic link to directory, traverse each that is specified on the command line2.9 Traversing symlinks
symbolic link to directory, traverse each that is specified on the command line13.1 chown: Change file owner and group
symbolic link to directory, traverse each that is specified on the command line13.2 chgrp: Change group ownership
symbolic link to directory, traverse each that is specified on the command line22.1 chcon: Change SELinux context of file
symbolic link, defined12.2 ln: Make links between files
symbolic links and ln12.2 ln: Make links between files
symbolic links and pwd19.1 pwd: Print working directory
symbolic links, changing group13.2 chgrp: Change group ownership
symbolic links, changing owner13.1 chown: Change file owner and group
symbolic links, changing owner13.1 chown: Change file owner and group
symbolic links, changing owner13.1 chown: Change file owner and group
symbolic links, changing owner13.2 chgrp: Change group ownership
symbolic links, changing time13.4 touch: Change file timestamps
symbolic links, copying11.1 cp: Copy files and directories
symbolic links, copying11.1 cp: Copy files and directories
symbolic links, copying with11.1 cp: Copy files and directories
symbolic links, dereferencing10.1.1 Which files are listed
symbolic links, dereferencing10.1.1 Which files are listed
symbolic links, dereferencing10.1.1 Which files are listed
symbolic links, dereferencing in du14.2 du: Estimate file space usage
symbolic links, dereferencing in du14.2 du: Estimate file space usage
symbolic links, dereferencing in stat14.3 stat: Report file or file system status
symbolic links, following11.2 dd: Convert and copy a file
symbolic links, permissions of13.3 chmod: Change access permissions
symbolic modes27.2 Symbolic Modes
sync11.2 dd: Convert and copy a file
sync (padding with ASCII NULs)11.2 dd: Convert and copy a file
synchronize disk and memory14.4 sync: Synchronize data on disk with memory
synchronized data and metadata I/O11.2 dd: Convert and copy a file
synchronized data and metadata writes, before finishing11.2 dd: Convert and copy a file
synchronized data reads11.2 dd: Convert and copy a file
synchronized data writes, before finishing11.2 dd: Convert and copy a file
syslog23.6 su: Run a command with substitute user and group ID
system context21. System context
system information, printing21.2 arch: Print machine hardware name
system information, printing21.3 nproc: Print the number of available processors
system information, printing21.4 uname: Print system information
system name, printing21.5 hostname: Print or set system name
System V sum6.2 sum: Print checksum and block counts

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