UNIX

To rip a CD/DVD ISO image with dd:

$ dd if=/dev/cdrom of=~/my.iso bs=1024

To mount an ISO image on Solaris:

# mount -F hsfs -o ro `lofiadm -a /export/temp/software.iso` /mnt

To print the route table on Solaris/BSD:

# netstat -r

To get the number of seconds since 1970-01-01:

# date +%s

To get the date in the format yyyy-mm-dd-HHMMSS:

# date +%F-%H%M%S

To backup a MySql database:

# mysqldump -h localhost -u username -ppassword dbname > \
  /var/backups/dbname_`date +%F-%H%M%S`.sql

To give all users execute permissions to a file or set of files (by wildcard):

# chmod a+x eg*

Note: use -R to recursively apply to subdirectories.