SHELL

crontab in linux

crontab -e						

10 * * * * /bin/sh test.sh    # every hour at 10"
0 */4 * * * /bin/sh test.sh   # every 4 hours at 0"
0 9-17 * * * /bin/sh test.sh  # every hour at 0" between 9 and 17
0 2 * * * /bin/sh test.sh     # daily at 2am
0 0 * * MON /bin/sh test.sh   # every Monday at 0am
0 0 * * 1-5 /bin/sh test.sh   # daily from Monday to Friday at 0am
0 0 * * 0 /bin/sh test.sh     # weekly on Sunday
0 0 1 * * /bin/sh test.sh     # monthly (1rst day at 0am)
0 0 1 */3 * /bin/sh test.sh   # every quarter (1st day at 0am)
0 0 1 1 * /bin/sh test.sh     # yearly (01/01)

crontab command

crontab -e						# to edit (then 'i': insert, ':wq!': save and quit)
10 * * * * /bin/sh backup.sh    # every hour at 10"
0 */4 * * * /bin/sh backup.sh   # every 4 hours at 0"
0 9-17 * * * /bin/sh backup.sh  # every hour at 0" between 9 and 17
0 2 * * * /bin/sh backup.sh     # daily at 2am
0 0 * * MON /bin/sh backup.sh   # every Monday at 0am
0 0 * * 1-5 /bin/sh backup.sh   # daily from Monday to Friday at 0am
0 0 * * 0 /bin/sh backup.sh     # weekly on Sunday
0 0 1 * * /bin/sh backup.sh     # monthly (1rst day at 0am)
0 0 1 */3 * /bin/sh backup.sh   # every quarter (1rst day at 0am)
0 0 1 1 * /bin/sh backup.sh     # yearly (01/01)

install crontab in linux

wget https://pypi.python.org/packages/47/c2/d048cbe358acd693b3ee4b330f79d836fb33b716bfaf888f764ee60aee65/crontab-0.20.tar.gz