BF_options (3ssl)    - Blowfish encryption
blk_limits_io_opt (9) - set optimal request size for a device
blk_queue_io_opt (9) - set optimal request size for the queue
btrfs (5)            - mount options and supported file attributes for the bt...
ccw_device_clear_options (9) - clear some options
ccw_device_set_options (9) - set some options
ccw_device_set_options_mask (9) - set some options and unset the rest
CPAN::Meta::Feature (3perl) - an optional feature provided by a CPAN distribu...
Data::OptList (3pm)  - parse and validate simple name/value option pairs
Devel::PartialDump (3pm) - Partial dumping of data structures, optimized for ...
dhcp-options (5)     - Dynamic Host Configuration Protocol options
dma_buf_attach (9)   - Add the device to dma_buf's attachments list; optional...
dma_buf_detach (9)   - Remove the given attachment from dmabuf's attachments ...
Dpkg::BuildOptions (3) - parse and update build options
enum_probe_type (9)  - device driver probe type to try Device drivers may opt...
ExtUtils::Mksymlists (3perl) - write linker options files for dynamic extension
fail2ban-regex (1)   - test Fail2ban "failregex" option
fmt (1)              - simple optimal text formatter
gcc-ar (1)           - a wrapper around ar adding the - plugin option
gcc-ar-4.7 (1)       - a wrapper around ar adding the - plugin option
gcc-ar-4.9 (1)       - a wrapper around ar adding the - plugin option
gcc-nm (1)           - a wrapper around nm adding the - plugin option
gcc-nm-4.7 (1)       - a wrapper around nm adding the - plugin option
gcc-nm-4.9 (1)       - a wrapper around nm adding the - plugin option
gcc-ranlib (1)       - a wrapper around ranlib adding the - plugin option
gcc-ranlib-4.7 (1)   - a wrapper around ranlib adding the - plugin option
gcc-ranlib-4.9 (1)   - a wrapper around ranlib adding the - plugin option
get_option (9)       - Parse integer from an option string
get_options (9)      - Parse a string into a list of integers
getopt (1)           - parse command options (enhanced)
getopt (3)           - Parse command-line options
Getopt::Std (3perl)  - Process single-character switches with switch clustering
Getopt::Long (3perl) - Extended processing of command line options
getopt_long (3)      - Parse command-line options
getopt_long_only (3) - Parse command-line options
getsockopt (2)       - get and set options on sockets
getsubopt (3)        - parse suboption arguments from a string
git-config (1)       - Get and set repository or global options
git-gc (1)           - Cleanup unnecessary files and optimize the local repos...
git-hash-object (1)  - Compute object ID and optionally creates a blob from a...
GnuPG::Options (3pm) - GnuPG options embodiment
grog (1)             - guess options for groff command
gtk-options (7)      - Standard Command Line Options for GTK+ Programs
hasmntopt (3)        - get filesystem descriptor file entry
hosts_options (5)    - host access control language extensions
kgdb_skipexception (9) - (optional) exit kgdb_handle_exception early
mallopt (3)          - set memory allocation parameters
my_print_defaults (1) - display options from option files
mysqloptimize (1)    - a table maintenance program
Net::DNS::RR::OPT (3pm) - DNS OPT resource record
optarg (3)           - Parse command-line options
opterr (3)           - Parse command-line options
optind (3)           - Parse command-line options
optopt (3)           - Parse command-line options
perlperf (1)         - Perl Performance and Optimization Techniques
php-config (1)       - get information about PHP configuration and compile op...
php-config5 (1)      - get information about PHP configuration and compile op...
Pod::Perldoc::GetOptsOO (3perl) - Customized option parser for Pod::Perldoc
posixoptions (7)     - optional parts of the POSIX standard
regulator_get_optional (9) - obtain optional access to a regulator.
scsi_unlock_floptical (9) - unlock device via a special MODE SENSE command
setsockopt (2)       - get and set options on sockets
shred (1)            - overwrite a file to hide its contents, and optionally ...
shtool-slo (1)       - GNU shtool separate linker options by library class
SSL_clear_options (3ssl) - manipulate SSL options
SSL_CTX_clear_options (3ssl) - manipulate SSL options
SSL_CTX_get_options (3ssl) - manipulate SSL options
SSL_CTX_set_options (3ssl) - manipulate SSL options
SSL_get_options (3ssl) - manipulate SSL options
SSL_get_secure_renegotiation_support (3ssl) - manipulate SSL options
SSL_set_options (3ssl) - manipulate SSL options
Type::Tiny::Manual::Optimization (3pm) - squeeze the most out of your CPU
uart_parse_earlycon (9) - Parse earlycon options
uart_parse_options (9) - Parse serial port baud/parity/bits/flow control.
uart_set_options (9) - setup the serial console parameters
VACUUM (7)           - garbage-collect and optionally analyze a database
w1_post_write (9)    - post-write options
warnings (3perl)     - Perl pragma to control optional warnings
write_one_page (9)   - write out a single page and optionally wait on I/O
x86_64-linux-gnu-gcc-ar (1) - a wrapper around ar adding the - plugin option
x86_64-linux-gnu-gcc-nm (1) - a wrapper around nm adding the - plugin option
x86_64-linux-gnu-gcc-ranlib (1) - a wrapper around ranlib adding the - plugin...
xfs (5)              - layout and mount options for the XFS filesystem
Xsession.options (5) - configuration options for Xsession (5)
Xwrapper.config (5)  - configuration options for X server wrapper
zshoptions (1)       - zsh options