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--- bash:files:search_files_for_specific_text [2021/01/26 16:36] – created peter
+++ bash:files:search_files_for_specific_text [2021/01/26 16:41] (current) – peter
@@ Line 1: / Line 1: @@
 ====== BASH - Files - Search files for specific text ======
+===== Simple Search =====
+Print all lines containing the keyword test:
+<code bash>
+grep test file.txt
+</code>
+----
+===== Search with many keywords =====
+Create a file that has all the keywords, one per line and run:
+<code bash>
+grep -f keywords.txt file.txt
+</code>
+----
+===== Search using read =====
+Process a file line by line, exit if the line is found:
+<code bash>
+while read line; do
+  echo $line | grep test && break;
+done < file.txt
+</code>
+----
+===== Read and Testing return status =====
+<code bash>
+while read line; do let c++; echo $line | grep test >/dev/null;
+  if [[ $? == 0 ]] ; then echo Match for line $c : $line;
+  else echo No match for line $c; fi
+done < file.txt
+</code>