超星 - 4.2 sed进阶-学习自测 - 查题吧

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仅打印文件hello.txt的第3行，并用-----上下包围该行：$ sed -ne _____________ hello.txt-----This game is good-----

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对文件 hello.txt，把从包含"you"的行开始一直到文件结尾整个替换为"\nHave a nice day"$ sed -e '_______________________' hello.txtHello WorldHave a nice day

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把所有偶数行替换为---seq 5 | sed '__________'1---3---5

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在文件foo.txt的每两行之后添加来自文件address.txt的一行内容$ cat foo.txtbla bla 2015 blablah 2018 blahbla bla blacopyright: 2020$ cat address.txtstart address: 0xA0, func1 address: 0xA0end address: 0xFF, func2 address: 0xB0$ sed -n 'p' address.txt | sed -e '________________' foo.txtbla bla 2015 blablah 2018 blahstart address: 0xA0, func1 address: 0xA0bla bla blacopyright: 2020end address: 0xFF, func2 address: 0xB0

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在文件address.txt的每一行前插入一行"---"，并且在其后添加来自文件map.txt的一行。$ cat map.txt0xA0 0x50000xB0 0x60000xFF 0x7000$ sed ___________________ address.txt---start address: 0xA0, func1 address: 0xA00xA0 0x5000---end address: 0xFF, func2 address: 0xB00xB0 0x6000

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文件hello.txt的内容如下：$ cat hello.txtHello WorldHow are youThis game is goodToday is sunny12345You are funny请用sed对该文件做如下处理：如果某行包含"e"，则把所有连续的重复字符变成大写并用{}括起来如果某行不包含"e"，但包含"u"则将该行所有大写字母用[]括起来# 注意：第二行的H和最后一行的Y没有被修改$ sed -r '_____________________________________' hello.txtHe{LL}o WorldHow are youThis game is g{OO}d[T]oday is sunny12345You are fu{NN}y

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输入行包含多个用空格分隔的字段，第一个字段包含一些用"-"分隔的数，请将第一个字段中的这些数用"[]"括起来。$ echo '281-81-883 92-5 two' | sed -r '___________________________________'[281]-[81]-[883] 92-5 two

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文件titles.txt的每行包含一个标题：以一个或多个"#"开头，后跟一个空格，然后是标题内容。现在需要把这些标题转化成链接形式：$ cat titles.txt# Linux Kernel## Bash Shell## The free software fundation$ sed -r '________________________________________________________' titles.txt# Linux Kernel## Bash Shell## The free software fundation

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打印文件tb.txt中所有位于标记top和bottom之间的行。第一条sed命令有问题，因为sed在找不到第二个地址时会一直匹配到文件结尾$ cat tb.txttop38.1bottomtop9485bottomtophello worldhow are you# 错误输出$ sed -n '/top/,/bottom/ {//!p}' tb.txt38.19485hello worldhow are you# 正确输出$ sed -nr '______________________________________________' tb.txt38.19485

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对文件hello.txt，将出现在标记How和12345之间的行替换为文件address.txt的内容。$ cat hello.txtHello WorldHow are youThis game is goodToday is sunny12345You are funny$ cat address.txtstart address: 0xA0, func1 address: 0xA0end address: 0xFF, func2 address: 0xB0$ sed -e '__________________________________________' hello.txtHello WorldHow are youstart address: 0xA0, func1 address: 0xA0end address: 0xFF, func2 address: 0xB012345You are funny

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