AIX 里的crontab如何使用(国外英文资料).docVIP

AIX 里的crontab如何使用(国外英文资料).doc

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AIX 里的crontab如何使用(国外英文资料)

AIX 里的crontab如何使用(国外英文资料) Crontab command use Submit, edit, list or remove cron jobs. grammar Crontab [-e] |-l [UserName] |-r [UserName] bbbb-3 File] describe This crontab command commits, edits, lists, or removes cron jobs. A cron job is a command that is run by the cron daemon at the scheduled interval of the rule. To submit a cron job, specify the crontab command to use the -e flag. The crontab command calls an edit session to allow you to create a crontab file. In this file, create entries for each cron. Each entry must be a format acceptable to the cron daemon. For information about creating items, see the crontab file entry format. After when creating the entry and exit documents, crontab command will copy it to the/var/spool/cron/crontabs directory, and put it in a file, the file is the name of the current user name. If the file named after the user name already exists in the crontabs directory, the crontab command overrides it. Similarly, you can create the crontab file by specifying the file parameters. If this file already exists, the format must be required by the cron daemon. If the file does not exist, the crontab command calls the editor. If the EDITOR environment variable exists, this command calls the EDITOR that it specifies. Otherwise, the crontab command calls the vi editor. To list the contents of the crontab file, specify the crontab command and use the -l flag. To remove existing files, use the -r flag. Optional UserName parameter can be the owner or the root user to use crontab file, for the specified user to edit, list, remove or validation cron job. If the UserName is invalid, the error message is generated and the program exits. If the optional UserName parameter is not specified, the crontab flag is available to the root user and the current user. security Only the owner of the root and crontab files can be in - e, l, r and - v sign behind using a UserName to edit, list, remove or verification of the specified user crontab files. The cron

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