我创建了一行如下所示的文本：
INSERT INTO radcheck(id, username, attribute, op, value) VALUES (,,00:23:32:c2:a9:e8,Auth-Type,:=,Accept);
我想用 sed 使它看起来像这样：
INSERT INTO radcheck(id, username, attribute, op, value) VALUES (,'','00:23:32:c2:a9:e8','Auth-Type',':=','Accept');
这在上下文中更有意义，并且在过去（显然）17 小时内，我已经深入了解了它：
#!/bin/bash
ssh ubnt@xxx.xxx.xxx.xxx brmacs >>MACS.txt mv MACS.txt /etc/persistent scp mhalls@xxx.xxx.xxx.xxx:/etc/persistent/MACS.txt MACS.txt
sed -i "1d" MACS.txt
head -c 58 MACS.txt >>shortmacs.txt
tail -c 18 shortmacs.txt >>usermac.txt
sed 's/"//g' usermac.txt >>usermacrdy.txt
sed -i 's/^/INSERT INTO `radcheck`(`id`, `username`, `attribute`, `op`, `value`) VALUES (,'',/' usermacrdy.txt
sed "s/$/','Auth-Type',':=','Accept');/" usermacrdy.txt > sqlquery.txt
sed -i "s/,,/\,\'\',\'/" sqlquery.txt
rm -f MACS.txt
rm -f shortmacs.txt …