Command not found: adb when executed from adb's directory

Question

I just installed android studio and and platform tools and I cant call adb even though its clearly located in the same directory. I get this error:

zsh: command not found: adb

I'm new to the android SDK so this probably an easy fix. Any ideas?

Example execution:

agconti-Inspiron-5520 :: android-studio/sdk/platform-tools » adb            1 ↵
zsh: command not found: adb
agconti-Inspiron-5520 :: android-studio/sdk/platform-tools » ll           127 ↵
total 3.2M
-rwxrwx--- 1 agconti agconti 1.3M Jun 21 21:09 adb
drwxrwx--- 2 agconti agconti 4.0K Jun 21 21:12 api
-rwxrwx--- 1 agconti agconti  47K Jun 21 21:09 dmtracedump
-rwxrwx--- 1 agconti agconti 220K Jun 21 21:09 etc1tool
-rwxrwx--- 1 agconti agconti 197K Jun 21 21:09 fastboot
-rwxrwx--- 1 agconti agconti 9.9K Jun 21 21:09 hprof-conv
-rw-rw---- 1 agconti agconti 704K Jun 21 21:12 NOTICE.txt
-rw-rw---- 1 agconti agconti   39 Jun 21 21:09 source.properties
-rwxrwx--- 1 agconti agconti 754K Jun 21 21:09 sqlite3
drwxrwx--- 2 agconti agconti 4.0K Jun 21 21:09 systrace 

Answer 1

Use:

./adb  

Unless . is in your path it won't be found. And for security, . shouldn't be in your path.