剛發現從來也沒用過的Linux apropos, 直接輸入apropos [keyword], 即可查看與keyword相關功能的命令。 該命令實際完成的是搜索其它命令的描述資訊，將相關命令羅列出來，不一定出現的命令就是想要的，但可以從中説明回憶到有用的命令。
Linux apropos使用方法，man apropos 自己看。
Linux apropos例子
用Linux apropos查找和sort相關的命令：
apropos sort Alphasort [scandir] (3) - scan a directory for matching entries bsearch (3) - binary search of a sorted array bsearch (3p) - binary search a sorted table bunzip2 (1) - a block-sorting file compressor , v1.0.2 bunzip2 [bzcat] (1) - a block-sorting file compressor, v1.0.2 bunzip2 [bzip2] (1) - a block-sorting file compressor, v1.0.2 bunzip2 [ bzip2recover] (1) - a block-sorting file compressor, v1.0.2 bzip2 (1) - a block-sorting file compressor, v1.0.2 bzip2 [bunzip2] (1) - a block-sorting file compressor, v1.0.2 bzip2 [bzcat ] (1) - a block-sorting file compressor, v1.0.2 bzip2 [bzip2recover] (1) - a block-sorting file compressor, v1.0.2 comm (1) - compare two sorted files line by line iterator_info_s [netsnmp_iterator_info_s] (3) - Holds iterator information containing functions which should be called by the iterator_ handler to loop over your data set and sort it in a SNMP specific manner ldap_sort_entries (3) - LDAP sorting routines ldap_sort_entries [ldap_sort] (3) - LDAP sorting routines ldap_sort_entries [ldap_sort_strcasecmp] (3) - LDAP sorting routines ldap_sort_entries [ldap_sort_values] (3) - LDAP sorting routines ldap_sort_strcasecmp (3) - LDAP sorting routines ldap_sort_strcasecmp [ldap_sort] (3) - LDAP sorting routines ldap_sort_strcasecmp [ldap_sort_entries] (3) - LDAP sorting routines ldap_sort_strcasecmp [ldap_sort_values] (3) - LDAP sorting routines ldap_sort_values (3) - LDAP sorting routines ldap_sort_values [ldap _sort] (3) - LDAP sorting routines ldap_sort_values [ldap_sort_ entries] (3) - LDAP sorting routines ldap_sort_values [ldap_sort_ strcasecmp] (3) - LDAP sorting routines lsort (n) - Sort the elements of a list qsort (3) - sorts an array qsort (3p) - sort a table of data sort (1) - sort lines of text files sort (1p) - sort, merge, or sequence check text files sort (3pm) - perl pragma to control sort() behaviour texindex (1) - sort Texinfo index files tsort (1) - perform topological sort tsort (1p) - topological sort uniq (1) - remove duplicate lines from a sorted file versionsort [scandir] (3) - scan a directory for matching entries
