[[email protected] scripts]$ a="abc|def|ghi"
[[email protected] scripts]$ echo ${a%|*}
abc|def
[[email protected] scripts]$ echo ${ a%%|*}
abc
[[email protected] scripts]$ echo ${a##|*}
abc|def|ghi
[[email protected] scripts]$ man bash
[[email protected] scripts]$ echo ${a##|*}
abc|def|ghi
[[email protected] scripts]$ echo ${a##|*}
abc|def|ghi
[[email protected] scripts]$ echo ${a##*| }
write
[[email protected] scripts]$ echo ${a#*|}
def|ghi
shell tricks
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