两个列表之间的grep

Question

I have a file ( list.txt ) containing a list of objects and another file informations.txt that contain a longer list of objects in the first column (containing also the objects of the file 1) and in the others columns some variables. I need to extract from the file informations.txt only the line that regarding the objects present in file list.txt . Example:

list.txt:
1ert3_001_______
4rt41_004_______

informations.txt: All the column are separated by "tab"
1ert3_001_______ GVT YTR 456
76ftr_008_______ TRF cFR 3k9
r45e9_001_______ YTG %&Y TF2
4rt41_004_______ %&/ ldu DR4

result.txt:
1ert3_001_______ GVT YTR 456
4rt41_004_______ %&/ ldu DR4

I tried to use the comand grep but I didn't obtain the desidered results.

Answer 1

如果您使用的是 GNU grep，请将 -f --file 与 -F --fixed-strings 结合使用以从文件中搜索固定（非正则表达式）模式：

grep --fixed-strings --file list.txt informations.txt

Answer 2

while read p; do
  grep -i "$p" informations.txt
done <list.txt

Try this.