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1. Directly bash + file name

root@DyanGong:~/27thNov2024# ls -ltri
total 4
67876 -rw-r--r-- 1 root root 28 Nov 27 10:43 hello.sh
root@DyanGong:~/27thNov2024# vim test_1.sh
root@DyanGong:~/27thNov2024# bash
hello.sh   test_1.sh
root@DyanGong:~/27thNov2024# bash test_1.sh
Hello Shell
Wed Nov 27 10:48:04 CST 2024
root
/root/27thNov2024

2. chmod file, then ./…/…(absolutely file route)filename

root@DyanGong:~/27thNov2024# ls -al
total 16
drwxr-xr-x  2 root root 4096 Nov 27 10:47 .
drwx------ 10 root root 4096 Nov 27 10:47 ..
-rw-r--r--  1 root root   28 Nov 27 10:43 hello.sh
-rw-r--r--  1 root root   48 Nov 27 10:47 test_1.sh
root@DyanGong:~/27thNov2024# chmod a+x test_1.sh
root@DyanGong:~/27thNov2024# ls -al
total 16
drwxr-xr-x  2 root root 4096 Nov 27 10:47 .
drwx------ 10 root root 4096 Nov 27 10:47 ..
-rw-r--r--  1 root root   28 Nov 27 10:43 hello.sh
-rwxr-xr-x  1 root root   48 Nov 27 10:47 test_1.sh
root@DyanGong:~/27thNov2024# cat test_1.sh
#!/bin/bashecho "Hello Shell"
date
whoami
pwd
root@DyanGong:~/27thNov2024# pwd
/root/27thNov2024
root@DyanGong:~/27thNov2024# ./test_1.sh
Hello Shell
Wed Nov 27 11:09:54 CST 2024
root
/root/27thNov2024root@DyanGong:~/27thNov2024# cd /
root@DyanGong:/# ./root/27thNov2024/test_1.sh
Hello Shell
Wed Nov 27 11:18:43 CST 2024
root
/