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Find the sevral ways to Do a task In Linux OS

apropos - search the manual page names and descriptions
A very Usefull command to find Out the Manual pages to particular task.. Means we can find.
how Many ways To do A task in Linux.. This is efficiency  of Linux OS. and this command will help Us to find the all ways to do a Task. for example this:------

[root@singh ~]# apropos network
Socket (3pm)         - networking constants and support functions
aseqnet (1)          - ALSA sequencer connectors over network
avahi-autoipd (8)    - IPv4LL network address configuration daemon
bssh (1)             - Browse for SSH/VNC servers on the local network
bvnc (1)             - Browse for SSH/VNC servers on the local network
byteorder (3)        - convert values between host and network byte order
ctstat (8)           - unified linux network statistics
dhclient-script (8)  - DHCP client network configuration script
dsktune (1)          - reports memory, network, and file system tuning settin...
dumpcap (1)          - Dump network traffic
endhostent (3)       - get network host entry
endhostent (3p)      - network host database functions
endnetent (3)        - get network entry
endnetent (3p)       - network database functions
endnetgrent (3)      - handle network group entries
endprotoent (3p)     - network protocol database functions
endservent (3p)      - network services database functions
ethtool (8)          - query or control network driver and hardware settings
freeaddrinfo (3)     - network address and service translation
freehostent (3)      - get network hostnames and addresses
gai_cancel (3)       - asynchronous network address and service translation
gai_error (3)        - asynchronous network address and service translation
gai_strerror (3)     - network address and service translation
gai_suspend (3)      - asynchronous network address and service translation
getaddrinfo (3)      - network address and service translation
getaddrinfo_a (3)    - asynchronous network address and service translation
gethostbyaddr (3)    - get network host entry
gethostbyaddr (3p)   - network host database functions
gethostbyaddr_r (3)  - get network host entry
gethostbyname (3)    - get network host entry
gethostbyname (3p)   - network host database functions
gethostbyname2 (3)   - get network host entry
gethostbyname2_r (3) - get network host entry
gethostbyname_r (3)  - get network host entry
gethostent (3)       - get network host entry
gethostent (3p)      - network host database functions
gethostent_r (3)     - get network host entry
getipnodebyaddr (3)  - get network hostnames and addresses
getipnodebyname (3)  - get network hostnames and addresses
getnetbyaddr (3)     - get network entry
getnetbyaddr (3p)    - network database functions
getnetbyaddr_r (3)   - get network entry (reentrant)
getnetbyname (3)     - get network entry
getnetbyname (3p)    - network database functions
getnetbyname_r (3)   - get network entry (reentrant)
getnetent (3)        - get network entry
getnetent (3p)       - network database functions
getnetent_r (3)      - get network entry (reentrant)
getnetgrent (3)      - handle network group entries
getnetgrent_r (3)    - handle network group entries
getprotobyname (3p)  - network protocol database functions
getprotobynumber (3p) - network protocol database functions
getprotoent (3p)     - network protocol database functions
getservbyname (3p)   - network services database functions
getservbyport (3p)   - network services database functions
getservent (3p)      - network services database functions
h_errno (3)          - get network host entry
h_errno (3p)         - error return value for network database operations
herror (3)           - get network host entry
hstrerror (3)        - get network host entry
htonl (3)            - convert values between host and network byte order
htonl (3p)           - convert values between host and network byte order
htons (3)            - convert values between host and network byte order
htons (3p)           - convert values between host and network byte order
if_indextoname (3p)  - map a network interface index to its corresponding name
if_nameindex (3p)    - return all network interface names and indexes
if_nametoindex (3p)  - map a network interface name to its corresponding index
ifconfig (8)         - configure a network interface
ifdown (8)           - bring a network interface up
ifenslave (8)        - Attach and detach slave network devices to a bonding d...
ifrename (8)         - rename network interfaces based on various static crit...
iftab (5)            - static information about the network interfaces
ifup (8)             - bring a network interface up
inet_network (3)     - Internet address manipulation routines
innetgr (3)          - handle network group entries
IO::Async::Listener (3pm) - listen on network sockets for incoming connections
ip-link (8)          - network device configuration
ip-netns (8)         - process network namespace management
iwconfig (8)         - configure a wireless network interface
iwgetid (8)          - Report ESSID, NWID or AP/Cell Address of wireless network
iwpriv (8)           - configure optionals (private) parameters of a wireless...
libpng (3)           - Portable Network Graphics (PNG) Reference Library 1.5.10
libpngpf (3)         - Portable Network Graphics (PNG) Reference Library 1.5....
lnstat (8)           - unified linux network statistics
lwres_endhostent (3) - lightweight resolver get network host entry
lwres_endhostent_r (3) - lightweight resolver get network host entry
lwres_gethostbyaddr (3) - lightweight resolver get network host entry
lwres_gethostbyaddr_r (3) - lightweight resolver get network host entry
lwres_gethostbyname (3) - lightweight resolver get network host entry
lwres_gethostbyname2 (3) - lightweight resolver get network host entry
lwres_gethostbyname_r (3) - lightweight resolver get network host entry
lwres_gethostent (3) - lightweight resolver get network host entry
lwres_gethostent_r (3) - lightweight resolver get network host entry
lwres_sethostent (3) - lightweight resolver get network host entry
lwres_sethostent_r (3) - lightweight resolver get network host entry
mii-diag (8)         - Network adapter control and monitoring
mount.nfs (8)        - mount a Network File System
mtr (8)              - a network diagnostic tool
nameif (8)           - name network interfaces based on MAC addresses
Net::Cmd (3pm)       - Network Command class (as used by FTP, SMTP etc)
Net::Time (3pm)      - time and daytime network client interface
netdb.h (0p)         - definitions for network database operations
netdevice (7)        - Low level access to Linux network devices
netreport (1)        - request notification of network interface changes
netstat (8)          - Print network connections, routing tables, interface s...
NetworkManager (8)   - network management daemon
NetworkManager.conf (5) - NetworkManager configuration file
NetworkManager_selinux (8) - Security Enhanced Linux Policy for the NetworkMa...
networks (5)         - network name information
nm-online (1)        - ask NetworkManager whether the network is connected
nm-system-settings.conf (5) - Deprecated NetworkManager configuration file
nm-tool (1)          - utility to report NetworkManager state and devices
nmap (1)             - Network exploration tool and security / port scanner
nmcli (1)            - command-line tool for controlling NetworkManager
nping (1)            - Network packet generation tool / ping utility
nstat (8)            - network statistics tools.
ntohl (3)            - convert values between host and network byte order
ntohl (3p)           - convert values between host and network byte order
ntohs (3)            - convert values between host and network byte order
ntohs (3p)           - convert values between host and network byte order
perlfaq9 (1)         - Networking
pifconfig (8)        - display information about a network interface
pilot-install-netsync (1) - reads or sets the Network Preferences information...
pilot-nredir (1)     - Accept connection and redirect via Network Hotsync Pro...
ping (8)             - send ICMP ECHO_REQUEST to network hosts
ping6 (8)            - send ICMP ECHO_REQUEST to network hosts
png (5)              - Portable Network Graphics (PNG) format
POE (3pm)            - portable multitasking and networking framework for any...
qemu-nbd (8)         - QEMU Disk Network Block Device Server
rdate (1)            - get the time via the network
rdisc (8)            - network router discovery daemon
rtacct (8)           - network statistics tools.
rtstat (8)           - unified linux network statistics
sane-net (5)         - SANE network backend
saned (8)            - SANE network daemon
services (5)         - Internet network services list
sethostent (3)       - get network host entry
sethostent (3p)      - network host database functions
setnetent (3)        - get network entry
setnetent (3p)       - network database functions
setnetgrent (3)      - handle network group entries
setprotoent (3p)     - network protocol database functions
setservent (3p)      - network services database functions
slattach (8)         - attach a network interface to a serial line
smbtree (1)          - A text based smb network browser
socket (n)           - Open a TCP network connection
tc-netem (8)         - Network Emulator
tcpbridge (1)        - Bridge network traffic across two interfaces
tcpdump (8)          - dump traffic on a network
tcpreplay (1)        - Replay network traffic stored in pcap files
tcpreplay-edit (1)   - Replay network traffic stored in pcap files
tcptraceroute (8)    - print the route packets trace to network host
tcptrack (1)         - Monitor TCP connections on the network
tracepath (8)        - traces path to a network host discovering MTU along th...
tracepath6 (8)       - traces path to a network host discovering MTU along th...
traceroute (8)       - print the route packets trace to network host
traceroute6 (8)      - print the route packets trace to network host
tshark (1)           - Dump and analyze network traffic
umount.nfs (8)       - unmount a Network File System
usernetctl (8)       - allow a user to manipulate a network interface if perm...
wget (1)             - The non-interactive network downloader.
wireshark (1)        - Interactively dump and analyze network traffic
[root@singh ~]#

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