Linux: how to get first line of a file
Example:
[root@tutorialspots ~]# head -1 /root/ok/ok2.txt 375584066214
Linux: how to get last line of a file
Example:
[root@tutorialspots ~]# tail -n -1 /root/ok/ok2.txt 369178446515
Linux: how to delete first line of a file
Example:
echo "$(tail -n +2 /root/ok/ok2.txt)" > /root/ok/ok2.txt
or
echo -e "$(sed '1d' /root/ok/ok2.txt)" > /root/ok/ok2.txt
