OS_Linux&Unix
[Linux/Unix] grep / egrep 차이점?
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2022. 9. 21. 15:14
grep 과 egrep 의 차이점은 없다.
다만 쓰이는 패턴은 다르다.
확장 정규표현식 egrep과 기본 정규표현식 grep의 차이는 아래와 같다.
egrep은 grep 명령어에 -E 또는 --extended-regexp 옵션을 준 것과 같다.
의미는 'OR' 이다. 또는.
기본 정규표현식에서는 메타문자 각각에 대하여 \ 문자를 통해 escape 처리를 해주어야 동작하게 된다.
egrep 'no(escape|character)' someFile
grep 'no\(escape\|character\)' someFile
이러한 차이 말고는 100% 동일하게 사용된다.
1. grep
find ./ -mtime -30 |xargs grep -s "error" ULOG.*
ULOG.081422:124043.tuxedo!tmshutdown.24184.1810002368.-2: FATAL: internal error: CMDTUX_CAT:764: ERROR: can't attach to BB
ULOG.081522:194609.tuxedo!tmboot.6951.2460131776.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081522:194706.tuxedo!tmboot.7020.3002724800.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:001925.tuxedo!tmboot.24305.1717105088.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:001937.tuxedo!tmboot.24317.840610240.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:002020.tuxedo!tmboot.24398.3811217856.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:002030.tuxedo!tmboot.24408.3820057024.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
./test_nxa.pc: printf("\nDB connect error! : sqlcode = %d\n", sqlca.sqlcode);
./ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
./ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
./ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
./ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
./ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
./ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
2. egrep
find ./ -mtime -30 |xargs egrep -s "error" ULOG.*
ULOG.081422:124043.tuxedo!tmshutdown.24184.1810002368.-2: FATAL: internal error: CMDTUX_CAT:764: ERROR: can't attach to BB
ULOG.081522:194609.tuxedo!tmboot.6951.2460131776.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081522:194706.tuxedo!tmboot.7020.3002724800.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:001925.tuxedo!tmboot.24305.1717105088.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:001937.tuxedo!tmboot.24317.840610240.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:002020.tuxedo!tmboot.24398.3811217856.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.081622:002030.tuxedo!tmboot.24408.3820057024.-2: CMDTUX_CAT:825: ERROR: Process WSL at simple failed with /T tperrno (TPESYSTEM - internal system error)
ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
./test_nxa.pc: printf("\nDB connect error! : sqlcode = %d\n", sqlca.sqlcode);
./ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
./ULOG.090122:095959.tuxedo!tmshutdown.11478.604955072.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
./ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
./ULOG.092022:155023.tuxedo!tmboot.16859.524120576.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found
./ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:754: ERROR: error processing configuration file
./ULOG.092122:103405.tuxedo!tmboot.3070.3044831744.-2: FATAL: internal error: CMDTUX_CAT:1360: ERROR: configuration file not found