Get help in Linux

In Linux, obtain the help man www.2cto.com man [Option] [command name] man directory: [root @ node203/] # ls/usr/share/manman initman-k keywordman-f keywordman-a keywordman-n keyword // The parameter does not exist, directly display the man parameter Help to find the usage of Shell commands ll -- help infoinfo mknodwhereis to find the location where the command is located whereis lsOPTIONS-B Search only for binaries. only Search for binary files-m Search only for manual sections. // find the main file-s Search only for sources. // find the source-u Search for unusual entries. A file is said to be unusual if it does not have one entry of each requested type. thus 'whereis-m-u * 'asks for those files in the current direc-since which have no documentation. // find unusual record files-B Change or otherwise limit the places where whereis searches for binaries. -M Change or otherwise limit the places where whereis searches for manual sections. -S Change or otherwise limit the places where whereis searches for sources. -f Terminate the last directory list and signals the start of file names, and must be used when any of the-B,-M, or-S options are used.