sort命令的使用

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命令格式：
sort [options] [file]

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example: 1 普通的sort，默认是以ascll码的顺序 [liuliancao@liuliancao exp]$ cat t5.txt b ac d q Aan not be and this C [liuliancao@liuliancao exp]$ sort t5.txt Aan not be and this b ac d q C 2 数字排序 [liuliancao@liuliancao exp]$ cat t6.txt 90 liu 89.8 lian 100 cao [liuliancao@liuliancao exp]$ sort t6.txt 100 cao 89.8 lian 90 liu [liuliancao@liuliancao exp]$ sort -n t6.txt 89.8 lian 90 liu 100 cao 结论：-n用于数字排序，number 3 指定key排序,-k指定第几列，-t指定分隔符号 [liuliancao@liuliancao exp]$ cat t7.txt liu 89.8 lian 28 cao 1999 [liuliancao@liuliancao exp]$ sort -n -k 2 t7.txt lian 28 liu 89.8 cao 1999 [liuliancao@liuliancao exp]$ cat t7.txt liu:89.8 lian:28 cao:1999 [liuliancao@liuliancao exp]$ sort -n -k 2 -t: t7.txt lian:28 liu:89.8 cao:1999 4 随机排序  -R [liuliancao@liuliancao exp]$ sort -R t8.txt li yan wu lu tian zhang [liuliancao@liuliancao exp]$ sort -R t8.txt li zhang yan wu lu tian 5 忽略大小写 -f [liuliancao@liuliancao exp]$ sort -f t9.txt AA ab BB bb CC [liuliancao@liuliancao exp]$ sort  t9.txt AA ab bb BB CC 结论：-f的BB在bb前面，说明在相同的情况下，优先是ascll码的反序 6 反序 -r reverse的意思 [liuliancao@liuliancao exp]$ sort t5.txt Aan not be and this b ac d q C [liuliancao@liuliancao exp]$ sort -r t5.txt C b ac d q and this Aan not be 结论：-r可以反转结果 7 输出到文件 [liuliancao@liuliancao exp]$ sort -r t6.txt  -o liuliancao.txt [liuliancao@liuliancao exp]$ cat liuliancao.txt 90 liu 89.8 lian 100 cao 结论：-o输出到文件 8 唯一的输出 [liuliancao@liuliancao exp]$ cat t9.txt liuliancao liuliancao lqx lqx liuliancao lqx liuliancao google baidu [liuliancao@liuliancao exp]$ sort -u t9.txt baidu google liuliancao lqx 结论：-u 使用uniq可以避免冗余输出

sort配合uniq使用

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#去掉重复值 [liuliancao@liuliancao exp]$ sort t9.txt | uniq baidu google liuliancao lqx #只打印唯一unique行 [liuliancao@liuliancao exp]$ sort t9.txt | uniq -u baidu google #只打印重复duplicate行 [liuliancao@liuliancao exp]$ sort t9.txt | uniq -d liuliancao lqx #对出现的次数进行计数 [liuliancao@liuliancao exp]$ sort t9.txt | uniq -c       1 baidu       1 google       4 liuliancao       3 lqx