abicompat: 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:

/usr/bin/abicompat - from package: libabigail

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

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