Hybrid Theory World Tour

The band started their tour as a support band. They first supported The Union Underground in their An Education in Rebellion Tour, then supported Kottonmouth Kings on their Ridin' High Tour (although three shows of this leg were cancelled), then P.O.D. on their Kings of the Game Tour and finally Papa Roach on their Master Bay Tour. The band also performed headlining shows and radio showcases when they had occasion.

The band's first headlining tour was named "Hybrid Theory European Promo Tour". It consisted of only five shows. All the shows in the leg were in Europe. The concert was played in France, Germany and England. The duration of the first leg was just four days. The leg was played for various events like "Nulle Part Ailleurs" and "BBC Radio One Evening Session". The first show in the tour was a promo show for Rock Sound Magazine. The second show by the band was Linkin Park's first TV appearance. The show by the band in London was aired by BBC. The song "Papercut" recorded while the show was made available as a special edition with the album.

The "Street Soldiers Tour" acted as the first fully headlining North American leg for the tour. The tour started in January 2001, and ended in February 2001. Taproot and Styles of Beyond were included as special guests in the tour. Later Alien Ant Farm replaced Styles of Beyond as Special guests. Whereas Stephen Richards gave a special appearance for a few shows in the tour besides he was with his own band "Taproot". The first show was played for 107.7 The End 'Endsession' which was the first ever headlining show for the band. The duration of the leg was a month and it included 20 shows across the United States. During the show at San Bernardino, B-Real from Cypress Hill introduced Linkin Park to the stage. The Dragon festival consisted of two stages, each inside a separate hangar at the Events Center - Jade Chamber and Crimson Chamber. Between the two hangars many booths were set up promoting various radio stations and selling food, drink, and products ranging from T-shirts to CDs to water pipes. Bands that played in the Jade Chamber consisted mainly of electronica and turntablists, while groups in the Crimson Chamber consisted of live bands and hip-hop bands. "Crawling" was released in a multi-angle video on the "Frat Party at the Pankake Festival" DVD with the studio version overdubbed, but with the crowd noise mixed in. After the show at Minnesota, Mike Shinoda wrote in the tour diary as,

Styles of Beyond has finished their time on our tour, and we were all sad to see them go home. They are really nice guys, and put on an excellent show. I heard they're going to go home to save up some money and showcase for some more record labels, as they are as of yet an unsigned act.

— Mike Shinoda

This was the first full European tour of the band. They opened for Deftones, with Taproot being the opening band.

The first show was played in support for Boarding for Breast Cancer. The duration of the leg was three months and it included 21 shows across the United States, Asia, Australia and Europe. This leg was a compact world tour in support of the album. Mike wrote on internet as tour diary as,

Getting out there again. Playing a few shows here in the states before we go to Australia, New Zealand, and Japan. Then more US dates. then Europe. then Ozzfest. And off dates (during ozzfest) with Slipknot, Papa Roach, Disturbed, and Mudvayne. We should be your town soon, so come say hi... And we're trying to work out a way to hang out with fans at Ozzfest; at most shows, we like to just come down and say hi, but Ozzfest is a different monster. We may have a booth, or be at the streetwise booth; we aren't sure yet. But just letting ya know.

— Mike Shinoda

As the band played around with their touring schedule in September 2001, originally they were to take a break after Ozzfest and then kick off an eleven show headlining tour of Europe in September. This show in Stockholm was the first show of the tour. Stockholm and Frederiksberg were cancelled just before the tour began for an unknown reason. The first three shows were cancelled due to various reasons. The reason for cancelling the second show was given as "Because of the "restructuring" of their U.S. tour has Linkin Park decided to cancel their concert in KB Hallen 9 September. Since there is no immediate prospect of a replacement concert, the tickets will be refunded where they were purchased until 15 October." The third show was cancelled due to the September 11 attacks. Addressing to the fans Mike said,

Due to the tragedy in the U.S., our show tonight was cancelled. We are unaware of the status of the upcoming shows. Berlin, tomorrow, is scheduled to go on as scheduled. Further updates can be found by calling your local venue, or by checking here.

— Mike Shinoda

The final leg of their tour took place after the band participated on the Family Values Tour, as a warm-up leg before the inaugural Projekt Revolution festival tour in early 2002.