用 TAB 替換空格，最後一列除外

我有一個看起來像這樣的文件。除了以 ID 開頭的最後一列之外，如何用 TAB 替換每個空格？

chr1 13513 14763 Medtr1g004950 . + JCVI gene . ID=Medtr1g004950;Note=hypothetical protein
chr1 15282 16532 Medtr1g004960 . + JCVI gene . ID=Medtr1g004960;Note=hypothetical protein
chr1 30972 32222 Medtr1g004980 . + JCVI gene . ID=Medtr1g004980;Note=hypothetical protein

任君挑選：

$ sed 's/ /\t/g; s/\t/ /10' file
chr1    13513   14763   Medtr1g004950   .       +       JCVI    gene    .       ID=Medtr1g004950;Note=hypothetical protein
chr1    15282   16532   Medtr1g004960   .       +       JCVI    gene    .       ID=Medtr1g004960;Note=hypothetical protein
chr1    30972   32222   Medtr1g004980   .       +       JCVI    gene    .       ID=Medtr1g004980;Note=hypothetical protein

$ sed 's/ /\t/g; s/\t\([^\t]*\)$/ \1/' file
chr1    13513   14763   Medtr1g004950   .       +       JCVI    gene    .       ID=Medtr1g004950;Note=hypothetical protein
chr1    15282   16532   Medtr1g004960   .       +       JCVI    gene    .       ID=Medtr1g004960;Note=hypothetical protein
chr1    30972   32222   Medtr1g004980   .       +       JCVI    gene    .       ID=Medtr1g004980;Note=hypothetical protein

引用自：https://unix.stackexchange.com/questions/689710