The commands below help in printing end characters of a line or a string. I assume that ORACLE_SID is set to "TESTDB" for examples below.
Print last one character from ORACLE_SID:
$ echo $ORACLE_SID | sed -e "s/^.*\(.\)$/1/"
Output: B
Print last two characters:
$ echo $ORACLE_SID | sed -e "s/^.*\(..\)$/1/"
Output: DB
Print last three characters:
$ echo $ORACLE_SID | sed -e "s/^.*\(...\)$/1/"
Output: TDB
The commands below help in trimming end characters of a line or a string. I assume that ORACLE_SID is set to "TESTDB" for examples below.
Trims last one character:
$ echo $ORACLE_SID | sed 's/.$//'
Output: TESTD
Trims last two characters:
$ echo $ORACLE_SID | sed 's/..$//'
Output: TEST
Trims last three characters:
$ echo $ORACLE_SID | sed 's/...$//'
Output: TES
Print last one character from ORACLE_SID:
$ echo $ORACLE_SID | sed -e "s/^.*\(.\)$/1/"
Output: B
Print last two characters:
$ echo $ORACLE_SID | sed -e "s/^.*\(..\)$/1/"
Output: DB
Print last three characters:
$ echo $ORACLE_SID | sed -e "s/^.*\(...\)$/1/"
Output: TDB
The commands below help in trimming end characters of a line or a string. I assume that ORACLE_SID is set to "TESTDB" for examples below.
Trims last one character:
$ echo $ORACLE_SID | sed 's/.$//'
Output: TESTD
Trims last two characters:
$ echo $ORACLE_SID | sed 's/..$//'
Output: TEST
Trims last three characters:
$ echo $ORACLE_SID | sed 's/...$//'
Output: TES
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