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老问题新手问:crontab backup
man crontab
crontab(1) crontab(1)
NAME
crontab - user job file scheduler
SYNOPSIS
crontab [file]
crontab -e [username]
crontab -l [username]
crontab -r [username]
DESCRIPTION
The crontab command manages a crontab file for the user. You can use
a crontab file to schedule jobs that are executed automatically by
cron (see cron(1M)) on a regular basis. The command has four forms:
crontab [file] Create or replace your crontab file by
copying the specified file, or standard
input if file is omitted or - is
Standard input |
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