How to unzip multiple files on a Unix-based operating systems

When extracting multiple zip files, remember to use single quotes to mask the zip-files:

unzip '*.zip'

For example, when unpacking the files needed to install Oracle 11.2.0.4:

[oracle@lx01 Downloads]$ ls -latr
total 5586768
-rwxr-x---.  1 root   root     1395582860 Sep  2 10:14 p13390677_112040_Linux-x86-64_1of7.zip
-rwxr-x---.  1 root   root     1151304589 Sep  2 10:14 p13390677_112040_Linux-x86-64_2of7.zip
-rwxr-x---.  1 root   root     1205251894 Sep  2 10:15 p13390677_112040_Linux-x86-64_3of7.zip
-rwxr-x---.  1 root   root      656026876 Sep  2 10:16 p13390677_112040_Linux-x86-64_4of7.zip
-rwxr-x---.  1 root   root      599170344 Sep  2 10:16 p13390677_112040_Linux-x86-64_5of7.zip
-rwxr-x---.  1 root   root      488372844 Sep  2 10:16 p13390677_112040_Linux-x86-64_6of7.zip
-rwxr-x---.  1 root   root      119521122 Sep  2 10:16 p13390677_112040_Linux-x86-64_7of7.zip
drwx------. 17 oracle oinstall       4096 Sep  2 10:27 ..
drwxr-xr-x.  2 oracle oinstall       4096 Sep  2 10:34 .
[oracle@lx01 Downloads]$ unzip 'p13390677_112040_Linux-x86-64_*.zip'

Without the quotes, unzip will look for "zip files within zip files".

Thanks to Chris Jean for the tip!