Bash
列印與字元串匹配的所有行以及該字元串之後的一組行數
我想從日誌文件中提取交通路口的相關數據及其連接。範例日誌：
SCN DD1251 At Glasgow Road - Kilbowie Road Modified By ________ Type CR Region WS Subregion UPSTREAM DOWNSTREAM FILTER NODE LINK NODE LINK LINK DD1271 C DD1271 R DD1351 D DD1351 B E Stage Suffix for Offset Optimizer 1 Double Cycle Initially ? N Force Single / Double Cycling status ? N Double Cycle Group 00 Double Cycle Ignore ? N Allow Link Max Saturation N Link Max Sat Override N Stages 1 2 3 4 Fixed N N N Y LRT stage N N N N Skip allowed N N N N Ped stage N N N N Ped invite N N N N Ghost stage N N N N Offset authority pointer 0 Split authority pointer 0 Offset opt emiss weight 000 I/green feedback inhibit N Bus Authority 00 ACIS node 00000 Bus Mode - Central extensions N Local extensions N Recalls N Stage skipping N Stage truncation N Cancels N Bus Priority Selection - Multiple buses N Queue Calculation N Hold recall if faulty N Disable recall N Disable long jtim N Real Cancel N Bus recall recovery type 0 Bus extension recovery type 0 Offset Bus authority pointer 0 Split Bus authority pointer 0 Bus skip recovery 0 Skip importance factor 0 Bus priority status OFF LRT sat 1 000 LRT sat 2 000 LRT sat 3 000 PEDESTRIAN FACILITIES Ped Node N Num Ped Wait Imp Factor 000 Ped Priority 0 Max Ped Priority Freq 00 Ped Lower Sat Threshold 000 Ped Upper Sat Threshold 000 Max Ped Wait Time 000 PEDESTRIAN VARIABLE INVITATION TO CROSS Allow Ped Invite N Ped Priority Auto 000 Ped Invite Upper Sat 000 Prio Level 1 2 3 4 Max Ped Priority Smoothed Time 000 000 000 000 Max Ped Priority Increase Length 00 00 00 00 CYCLE TIME FACILITIES Allow Node Independence N Operator Node Independence 0 Ghost Demand Stage N Num Ghost Assessment Cycles 15 Upper Trigger Ghost 04 Lower Trigger Ghost 0 SCN DD1271 At Glasgow Road - Hume Street Modified 13-OCT-15 15:06 By BDAVIDSON Type CR Region WS Subregion UPSTREAM DOWNSTREAM FILTER NODE LINK NODE LINK LINK DD1301 T DD1301 A DD1251 R DD1251 C Stage Suffix for Offset Optimizer 1 Double Cycle Initially ? N Force Single / Double Cycling status ? N Double Cycle Group 00 Double Cycle Ignore ? N Allow Link Max Saturation N Link Max Sat Override N Stages 1 2 3 Fixed N Y Y LRT stage N N N Skip allowed N N N Ped stage N N N Ped invite N N N Ghost stage N N N Offset authority pointer 0 Split authority pointer 0 Offset opt emiss weight 000 I/green feedback inhibit N Bus Authority 00 ACIS node 00000 Bus Mode - Central extensions N Local extensions N Recalls N Stage skipping N Stage truncation N Cancels N Bus Priority Selection - Multiple buses N Queue Calculation N Hold recall if faulty N Disable recall N Disable long jtim N Real Cancel N Bus recall recovery type 0 Bus extension recovery type 0 Offset Bus authority pointer 0 Split Bus authority pointer 0 Bus skip recovery 0 Skip importance factor 0 Bus priority status OFF LRT sat 1 000 LRT sat 2 000 LRT sat 3 000 PEDESTRIAN FACILITIES Ped Node N Num Ped Wait Imp Factor 000 Ped Priority 0 Max Ped Priority Freq 00 Ped Lower Sat Threshold 000 Ped Upper Sat Threshold 000 Max Ped Wait Time 000 PEDESTRIAN VARIABLE INVITATION TO CROSS Allow Ped Invite N Ped Priority Auto 000 Ped Invite Upper Sat 000 Prio Level 1 2 3 4 Max Ped Priority Smoothed Time 000 000 000 000 Max Ped Priority Increase Length 00 00 00 00 CYCLE TIME FACILITIES Allow Node Independence N Operator Node Independence 0 Ghost Demand Stage N Num Ghost Assessment Cycles 15 Upper Trigger Ghost 04 Lower Trigger Ghost 0我已經可以使用以下 Bash 腳本提取第一條相關行：
grep SCN* LOG.TXT > JUNCTIONS.txt它創建了一個所有路口的列表，如下所示：
SCN DD1251 At Glasgow Road - Kilbowie Road SCN DD1271 At Glasgow Road - Hume Street SCN DD1301 At Glasgow Road - Argyll Road - Cart Street SCN DD1351 At Kilbowie Road - Chalmers Street ...但是，我想在每個連結標題之後立即提取行，直到大量空白之前的節點的最終連結，並且不擷取從 Stage Suffix 開始直到下一個連結的任何內容。
有沒有辦法修改我的 BASH 腳本以在它找到的每個匹配實例之後包含額外數量的行？
這是你想要的嗎？
sed -n '/^SCN/,/^\s*$/p' LOG.TXT它列印兩個模式之間的線條（以及包含它們的線條）：
- ‘SCN’ 出現在行首 (
^SCN)- 和一個包含 0 個或多個空白字元的空白行 (
^\s*$)並輸出以下內容：
SCN DD1251 At Glasgow Road - Kilbowie Road Modified By ________ Type CR Region WS Subregion UPSTREAM DOWNSTREAM FILTER NODE LINK NODE LINK LINK DD1271 C DD1271 R DD1351 D DD1351 B E SCN DD1271 At Glasgow Road - Hume Street Modified 13-OCT-15 15:06 By BDAVIDSON Type CR Region WS Subregion UPSTREAM DOWNSTREAM FILTER NODE LINK NODE LINK LINK DD1301 T DD1301 A DD1251 R DD1251 C