file文件内容如下
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[root@test1 test]# cat file
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2 The world is not you can do, but you should.
o
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一、 sed
sed '/^$/d' file #删除空行
sed '/^\s*$/d' file #删除包含有空格的空行
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[root@test1
test
]
# sed '/^$/d' file
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2 The world is not you can
do
, but you should.
o
[root@test1
test
]
#
[root@test1
test
]
# sed '/^\s*$/d' file
1
2 The world is not you can
do
, but you should.
o
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二、grep
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[root@test1
test
]
# grep -v "^\s*$" file
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2 The world is not you can
do
, but you should.
o
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三、awk
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[root@test1 test]# awk NF file
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2 The world is not you can do, but you should.
o
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[root@test1 test]# awk '!/^$/' file
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2 The world is not you can do, but you should.
o
未剔除含有空格的空行
[root@test1 test]# awk '!/^[[:space:]]+/ && !/^$/' file
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2 The world is not you can do, but you should.
o
剔除了含有空格的行
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本文转自 xoyabc 51CTO博客，原文链接：http://blog.51cto.com/xoyabc/1684530，如需转载请自行联系原作者
