[英]Remove first comma from a csv file in bash
I have a csv file in which some lines start with a comma, so I want to remove all of them. 我有一个csv文件,其中一些行以逗号开头,所以我想删除所有这些。
Example: In this line: ,"a","b","c"
, I want to remove the first comma. 示例:在这一行:
,"a","b","c"
,我想删除第一个逗号。
How do I do this in bash? 我怎么在bash中这样做?
You can use this sed
: 你可以使用这个
sed
:
sed -i '' 's/^[[:blank:]]*,//' file.csv
^[[:blank:]]*,
will match comma at line start with optional whitespaces before comma. ^[[:blank:]]*,
将逗号与逗号之前的可选空格匹配。
try this; 试试这个;
sed 's/^,//' csvFile > newCSVfile
Ex; 防爆;
user@host:/tmp$ echo ',"a","b","c"' | sed 's/^,//'
"a","b","c"
Do not use "g" flag in sed, it will help you in removing only first matching "," 不要在sed中使用“g”标志,它将帮助您仅删除第一个匹配的“,”
echo ',"a","b","c"' | sed 's/^,//'
For file : 对于文件:
sed -i.bak 's/^,//' infile.log
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