1、按單詞出現頻率降序排序！ 2、按字母出現頻率降序排序！ the?squid?project?provides?a?number?of?resources?to?assist?users?design,implement?and?support?squid?installations.?Please?browse?the?documentation?and?support?sections?for?more?infomation 解答： [root@oldboy?~]#?cat?oldboy.txt? the?squid?project?provides?a?number?of?resources?to?assist?users?design,implement?and?support?squid?installations.?Please?browse?the?documentation?and?support?sections?for?more?infomation按單詞排序解答：法1： [root@oldboy?scripts]#?tr?",."?"?"?<oldboy.log|xargs?-n?1|sort|uniq?-c|sort?-rn|head2?the2?support2?squid2?and1?users1?training1?to1?sections1?resources1?provides法2： [root@oldboy?scripts]#?tr?",."?"?"?<oldboy.log|xargs?-n?1|awk?'{S[$1]++}END{for(key?in?S)print?S[key],key}'|sort?-rn|head2?the 2?support 2?squid 2?and 1?users 1?training 1?to 1?sections 1?resources 1?provides法3： [root@oldboy?scripts]#?awk?-F?"[,.?]+"?'{for(i=1;i<=NF;i++)S[$i]++}END{for(key?in?S)print?S[key],key}'?oldboy.log?|sort?-rn|head 2?the 2?support 2?squid 2?and 1?users 1?training 1?to 1?sections 1?resources 1?provides按字母頻率排序 法1 [root@MySQL?~]#?tr?"{?|,|.}"?"\n"<oldboy.txt|awk?-F?""??'{for(i=1;i<=NF;i++)array[$i]++}END{for(key?in?array)print?array[key],key|"sort?-nr"}' 19?s 17?e 16?o 14?t 12?n 12?i 11?r 9?a 8?u 7?p 7?d 6?m 4?l 4?c 3?f 2?q 2?h 2?b 1?w 1?v 1?P 1?j 1?g[root@MySQL?~]#?tr?"[?,.]"?"\n"<oldboy.txt|awk?'{for(i=1;?i<=length($0);?i++)?++S[substr($0,i,1)]}?END?{for(a?in?S)?print?S[a],?a|"sort?-rn"}' 19?s 17?e 16?o 14?t 12?n 12?i 11?r 9?a 8?u 7?p 7?d 6?m 4?l 4?c 3?f 2?q 2?h 2?b 1?w 1?v 1?P 1?j 1?g[root@db02?oldboy20151227]#?echo?"the?squid?project?provides?a?number?of?resources?toassist?users?design,implement?and?support?squid?installations.?Please?browsethe?documentation?and?support?sections?for?more?infomation"|sed?'s#?##g'|sed?-r?'s#(.)#\1\n#g'|sort|uniq?-c|sort?-rn?-k119?s17?e16?o14?t12?n12?i11?r9?a8?u7?p7?d6?m4?l4?c3?f2?q2?h2?b1?w1?v1?j1?g1?P1?.1?,1?[root@db02?oldboy20151227]#?echo?"the?squid?project?provides?a?number?of?resources?toassist?users?design,implement?and?support?squid?installations.?Please?browsethe?documentation?and?support?sections?for?more?infomation"|sed?'s#?##g'|awk?-F?""?'{for(n=1;n<=NF;n++)?print?$n}'|sort|uniq?-c|sort?-k1?-nr19?s17?e16?o14?t12?n12?i11?r9?a8?u7?p7?d6?m4?l4?c3?f2?q2?h2?b1?w1?v1?j1?g1?P1?.1?,

有關AWK數組的超詳細案例講解就在老男孩教育最新高級運維班課程！

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