# Linux Crontab

## Python-Crontab
- Install ```pip install python-crontab```

### Create

from crontab import CronTab

cron = CronTab(user='nafeem_haque')
job = cron.new(command='cd && echo hello_world > checktest.txt', comment="id1-xxyyzz")
job.minute.every(1)
cron.write()

print(cron)

### Update

from crontab import CronTab

cron = CronTab(user='nafeem_haque')
print(cron)

for job in cron:
    if job.comment == 'id1-xxyyzz':
        job.command = 'cd && echo hello_world12 > checktest.txt'
        cron.write()

print(cron)        

### Remove

from crontab import CronTab

cron = CronTab(user='nafeem_haque')
print(cron)

for job in cron:
    if job.comment == 'id1-xxyyzz':
        cron.remove(job)
        cron.write()

print(cron) 

#### Supports
- Single User
- Global
- Find By Comment
- Find By Time Format

#### Works
- By Creating Temp File
- Then Move

## Crontab

#### Supports
- Writes it to tmp file
- Checks if correct
- Then moves it to location

## Crontabs-Evatix
- Supports Global
- Issue With Single User (Update File OwnerShip)
- Writing Works
- Issue With Updating
- Supports Line Editing
- Supports Exact Match Editing
- Can be upgraded

## Options To Solve
1. Remove Entirely And Create
2. Current With Issue
- If Non Existent
- Touch
- Write
- Change Ownership
- Chmod 600
- If Exists
- Change Ownership (Issue Here)
- Write
- Change Ownership Back.
3. Write To Temp File Then Move (Need Implementation)

sudo crontab -u b abc.txt