根据条件搜索字符串并打印到下一个匹配的字符串

Question

我正在寻找这个问题的解决方案。我得到了一个带有输出的文件，如下所示：

Memory Device
    Array Handle: 0x00E2
    Error Information Handle: No Error
    Total Width: 32 bits
    Data Width: 32 bits
    Size: 512 MB
    Form Factor: DIMM
    Set: None
    Locator: RAM slot #0
    Bank Locator: RAM slot #0
    Type: DRAM
    Type Detail: EDO
    Speed: Unknown
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified
Memory Device
    Array Handle: 0x00E2
    Error Information Handle: No Error
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: DIMM
    Set: None
    Locator: RAM slot #1
    Bank Locator: RAM slot #1
    Type: DRAM
    Type Detail: Unknown
    Speed: Unknown
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified
Memory Device
    Array Handle: 0x00E2
    Error Information Handle: No Error
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: DIMM
    Set: None
    Locator: RAM slot #2
    Bank Locator: RAM slot #2
    Type: DRAM
    Type Detail: Unknown
    Speed: Unknown
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified
Memory Device
    Array Handle: 0x00E2
    Error Information Handle: No Error
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: DIMM
    Set: None
    Locator: RAM slot #3
    Bank Locator: RAM slot #3
    Type: DRAM
    Type Detail: Unknown
    Speed: Unknown
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified

---

在这里，每个段落

都以"存储设备"开头，因此我想搜索每个带有数值的"大小"列的段落，并仅打印这些段落。因此，我不需要打印任何大小值为"大小：未安装模块"的段落。这是命令 "dmidecode --type memory" 的部分输出。谢谢你帮助我。

Answer 1

前提是输出的格式始终与您可以执行的操作相同

grep -E '[[:blank:]]Size: [0-9]+' mem.txt -A 11 -B 6

[编辑] -B 10 之所以有效，只是因为只有第一个条目具有数字大小。 -B 6 应该工作得更好。感谢您的评论。