Detailed explanation of linux head command

Overview: head command is used to display file text blocks(Recommended learning: web front-end video tutorial)

1. Format

head [Parameter] [File]

2. Parameter

-q Hide file name

-v Display file name

-c Number of bytes displayed

-n Number of lines displayed

3. Example

#创建文件 head.txt
cat > head.txt<<EOF
> 1
> 2
> 3
> 4
> 5
> 6
> 7
> 8
> 9
> 10
> 11
> 12
> EOF

#显示前5行
head -n  5 head.txt

#显示前5个字节
head -c 5 head.txt

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