envs
/
help
mirror of https://git.envs.net/envs/help.git
1
0
Fork 0
Code Releases Activity

update scheduled activity (cron and at)

This commit is contained in:
creme 2019-12-29 14:04:45 +01:00
parent f52a0ff082
commit 7f77770728
Signed by: creme
GPG Key ID: C147C3B7FBDF08D0
1 changed files with 23 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
docs/help.md
View File

@ -190,8 +190,12 @@ to your .bashrc .
to get your timezone you can use `date`.
## # cron/crontab
with cron you can run specific tasks at a specific time.
## # scheduled activity
the linux utilities `cron` and `at` are related commands. you might use crontab, for example, to perform a task each morning at 2 a.m., and use at to remind yourself of an appointment later in the day.
### cron/crontab
the cron utility allows you to schedule a repetitive task to take place at any regular interval desired.<br />
for more information see the manual pages of crontab(5) and cron(8)
display current crontabs:<br />
&nbsp;&nbsp;`crontab -l`
@ -202,11 +206,27 @@ add/edit crontabs:<br />
example: - backup your mysql db once per day
```bash
..
# NOTE: * To disable email notifications use:
# - for single cronjobs use after the cmd: >/dev/null 2>&1
# - comment out to disable all email alerts in the crontab:
#MAILTO=""
# m h dom mon dow command
0 0 * * * /usr/local/bin/envs_mysql.sh backup
```
for more information see the manual pages of crontab(5) and cron(8)
### at
the at command lets you specify a one-time action to take place at some desired time.<br />
for more information see the manual page of at.
example:<br />
`echo 'my test in one minute' | at now + 1 min`
view your at queue:<br />
&nbsp;&nbsp;`at -l` or `atq`<br />
`2 Sun Dec 29 14:03:00 2019 a creme`
delete at job id 2:<br />
&nbsp;&nbsp;`at -r 2` or `atrm 2`
## # daemonize processes
so you've got a process that you want to keep running. you might have it in a<br />