head — https://linux.die.net/man/1/head https://linux.die.net/man/1/head tail — https://linux.die.net/man/1/tail https://linux.die.net/man/1/tail less — https

head — https://linux.die.net/man/1/head https://linux.die.net/man/1/head tail — https://linux.die.net/man/1/tail https://linux.die.net/man/1/tail less — https://linux.die.net/man/1/less https://linux.die.net/man/1/less