How can I read after . up to __ and save in a new .txt file with bash?
File
2021-01-12-1530.HUIG__002
2021-01-12-1530.MEIG__002
2021-01-12-1530.PCIG__002
2021-01-12-1530.PEIG__002
2021-01-12-1530.PNIG__002
2021-01-12-1530.TGIG__002
2021-01-12-1530.TOIG__002
2021-01-12-1530.TPIG__002
2021-01-12-1530.TXIG__002
2021-01-12-1530.UXUV__002
2021-01-12-1530.CCIG__002
2021-01-12-1530.CMIG__002
2021-01-12-1530.OXIG__002
2021-01-12-1530.PLIG__002
2021-01-12-1530.TUIG__002
2021-01-12-1530.YAIG__002
2021-01-12-1530.ZIIG__002
2021-01-12-1530.FTIG__002
2021-01-12-1530.NEUV__002
2021-01-12-1530.TLIG__002
2021-01-12-1530.YOIG__002
2021-01-12-1530.DAIG__002
2021-01-12-1530.HLIG__002
CodePudding user response：
This works:
$ head file1.txt
2021-01-12-1530.HUIG__002
2021-01-12-1530.MEIG__002
2021-01-12-1530.PCIG__002
2021-01-12-1530.PEIG__002
2021-01-12-1530.PNIG__002
2021-01-12-1530.TGIG__002
2021-01-12-1530.TOIG__002
2021-01-12-1530.TPIG__002
2021-01-12-1530.TXIG__002
2021-01-12-1530.UXUV__002
$ cut -d. -f2 file1.txt | cut -d_ -f1 | head
HUIG
MEIG
PCIG
PEIG
PNIG
TGIG
TOIG
TPIG
TXIG
UXUV
And saving to a new file:
cut -d. -f2 file1.txt | cut -d_ -f1 > file2.txt
CodePudding user response：
With just bash (i.e. not GNU utils):
while read -r line;
do
tmp="${line##*.}"
echo "${tmp%%_*}"
done < file.txt > file_2.txt
(one liner)
while read -r line; do tmp="${line##*.}"; echo "${tmp%%_*}"; done < test.txt > file2.txt
CodePudding user response：
With sed(1)
sed 's/^.*\.//;s/__.*$//' file.txt > new_file.txt
With GNU grep(1) which has support for PCRE
grep -Po '(?<=\.).*(?=__.*)' file.txt > new_file.txt