how to print the line in case the first field start with Linux1

for example:

```
  echo Linux1_ver2  12542 kernel-update  |   awk '{if ($1 ~ Linux1 ) print $0;}'

```

the target is to print the line , while the first field start with Linux1

example of lines:

```
Linux1-new  36352 Version:true
Linux1-1625543  9847
Linux1:16254 8467563 

```

remark - space or TAB could be before the first filed