passo1
sed -r "s/\s+$//g" orgial_textfile| awk '{print $0"|"}' >>orginal_final_textfile
Passo 2
salve a variável array em need_copy_textfile
sample need_copy_textfile format will be
133.7545755174117347
197.5730453102068415
211.0612457141076671
195.3965252988823307
155.9141492798344956
122.0765862336716795
109.3807402580878840
100.1258594727256394
118.3713165600757955
129.9118732920391577
130.2183465952591614
108.3783455600275339
87.3744866455706415
.
.
.
75.0594939607898664
awk '{print substr($1,1,6)}' need_copy_textfile >> need_copy_textfile_final.txt
passo 3
Agora combine acima de 2 arquivos para obter o resultado necessário
paste orginal_final_textfile need_copy_textfile_final.txt | sed -r "s/\t+//g"
Exemplo de saída
61537000|COO|DI|VMD|2018-01-08 00:00:00|133.75
61537000|COO|DI|VMD|2018-01-09 00:00:00|197.57
61537000|COO|DI|VMD|2018-01-10 00:00:00|211.06
61537000|COO|DI|VMD|2018-01-11 00:00:00|195.39
61537000|COO|DI|VMD|2018-01-12 00:00:00|155.91