tail 처럼 journalctl 도 -f 옵션을 주면 실시간으로 볼 수 있고
| $ journalctl -u servicename -f |
--since 옵션과 --no-paper 옵션을 주면 특정 시간이내의 내용을 멈추지 않고 볼 수 있다. (기본적으로 less나 more로 멈춤)
| $ journalctl -u servicename --since "2 minutes ago" --no-pager |
| $ journalctl --help journalctl [OPTIONS...] [MATCHES...] Query the journal. Options: --system Show the system journal --user Show the user journal for the current user -M --machine=CONTAINER Operate on local container -S --since=DATE Show entries not older than the specified date -U --until=DATE Show entries not newer than the specified date -c --cursor=CURSOR Show entries starting at the specified cursor --after-cursor=CURSOR Show entries after the specified cursor --show-cursor Print the cursor after all the entries --cursor-file=FILE Show entries after cursor in FILE and update FILE -b --boot[=ID] Show current boot or the specified boot --list-boots Show terse information about recorded boots -k --dmesg Show kernel message log from the current boot -u --unit=UNIT Show logs from the specified unit --user-unit=UNIT Show logs from the specified user unit -t --identifier=STRING Show entries with the specified syslog identifier -p --priority=RANGE Show entries with the specified priority --facility=FACILITY... Show entries with the specified facilities -g --grep=PATTERN Show entries with MESSAGE matching PATTERN --case-sensitive[=BOOL] Force case sensitive or insensitive matching -e --pager-end Immediately jump to the end in the pager -f --follow Follow the journal -n --lines[=INTEGER] Number of journal entries to show --no-tail Show all lines, even in follow mode -r --reverse Show the newest entries first -o --output=STRING Change journal output mode (short, short-precise, short-iso, short-iso-precise, short-full, short-monotonic, short-unix, verbose, export, json, json-pretty, json-sse, json-seq, cat, with-unit) --output-fields=LIST Select fields to print in verbose/export/json modes --utc Express time in Coordinated Universal Time (UTC) -x --catalog Add message explanations where available --no-full Ellipsize fields -a --all Show all fields, including long and unprintable -q --quiet Do not show info messages and privilege warning --no-pager Do not pipe output into a pager --no-hostname Suppress output of hostname field -m --merge Show entries from all available journals -D --directory=PATH Show journal files from directory --file=PATH Show journal file --root=ROOT Operate on files below a root directory --image=IMAGE Operate on files in filesystem image --namespace=NAMESPACE Show journal data from specified namespace --interval=TIME Time interval for changing the FSS sealing key --verify-key=KEY Specify FSS verification key --force Override of the FSS key pair with --setup-keys Commands: -h --help Show this help text --version Show package version -N --fields List all field names currently used -F --field=FIELD List all values that a specified field takes --disk-usage Show total disk usage of all journal files --vacuum-size=BYTES Reduce disk usage below specified size --vacuum-files=INT Leave only the specified number of journal files --vacuum-time=TIME Remove journal files older than specified time --verify Verify journal file consistency --sync Synchronize unwritten journal messages to disk --relinquish-var Stop logging to disk, log to temporary file system --smart-relinquish-var Similar, but NOP if log directory is on root mount --flush Flush all journal data from /run into /var --rotate Request immediate rotation of the journal files --header Show journal header information --list-catalog Show all message IDs in the catalog --dump-catalog Show entries in the message catalog --update-catalog Update the message catalog database --setup-keys Generate a new FSS key pair See the journalctl(1) man page for details. |
'Linux' 카테고리의 다른 글
| 리눅스 메모리 timing 확인하기 (0) | 2026.01.27 |
|---|---|
| proc fs smp_affinity (0) | 2025.09.19 |
| sudo time (0) | 2025.09.17 |
| dd 로 덤프 하면서 바로 압축하기 (0) | 2025.07.24 |
| gpiod - gpiomon (0) | 2025.07.17 |
