Shell variable transfer distortion

for example

a=`set_var EASYRSA        "${0%/*}"`;

echo a;

set_var EASYRSA        "${0%/*}"



set_var EASYRSA  "${0%/*}"


Thank you.

printing tabs directly will not change, once the assignment tabs will change spaces.

Aug.28,2021
When

passes parameters, shell automatically removes empty strings, tabs, etc., leaving only a space, unless you enclose the


tabs in double quotation marks, do not type the tabs by hand, and use \ t instead, the first diagonal is the escape character.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b42b43-2bb7e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b42b43-2bb7e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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