lspci: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/sbin/lspci - from package: pciutils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/lspci - from package: pciutils

You may install the required package with command apt-get install {package}

Error in other languages:
lspci: bevel nie gevind nie
lspci: comandă negăsită
lspci: comando não encontrado
lspci: commande introuvable
lspci: command not found
lspci: käsku ei ole
lspci: không tìm thấy lệnh
lspci: komanda nerasta
lspci: Kommando nicht gefunden.
lspci: kommandot finns inte
lspci: komut yok
lspci: nie znaleziono polecenia
lspci: níor aimsíodh an t-ordú
lspci: no se encontró la orden
lspci: no s'ha trobat l'ordre
lspci: opdracht niet gevonden
lspci: parancs nem található
lspci: perintah tidak ditemukan
lspci: príkaz nenájdený
lspci: příkaz nenalezen
lspci: команда не найдена
lspci: командата не е открита
lspci: 命令找不到
lspci: コマンドが見つかりません