Category: technology

Using username "root".
Authenticating with public key "rsa-key-20170603" from agent
Last login: Thu Aug 16 20:40:43 2018 from pc7
[root@server1 ~]# whereis php
php: /usr/bin/php /usr/lib64/php /etc/php.d /etc/php.ini /usr/share/php /usr/share/man/man1/php.1.gz
[root@server1 ~]# whereis python
python: /usr/bin/python2.7 /usr/bin/python /usr/lib/python2.7 /usr/lib64/python2.7 /etc/python /usr/include/python2.7 /usr/share/man/man1/python.1.gz
[root@server1 ~]# whereis perl
perl: /usr/bin/perl /usr/share/man/man1/perl.1.gz
[root@server1 ~]# whereis bash
bash: /usr/bin/bash /usr/share/man/man1/bash.1.gz
[root@server1 ~]# 
[root@server1 ~]# mkdir blog
[root@server1 ~]# cd blog
[root@server1 blog]# vim script.sh
[root@server1 blog]# chmod u+x script.sh
[root@server1 blog]# cat script.sh
#!/usr/bin/bash
# using the case command
#

read -p "Please enter language: " lang

case $lang in
    py | python | Python)
        /usr/bin/python2.7 py.py;;
    shell | sh)
        /usr/bin/bash shell.sh;;
    perl | pl)
        /usr/bin/perl perl.pl;;
    php)
        /usr/bin/php php.php;;
    *)
        echo "sh, php, py or pl only, you entered "$lang ;;
esac

# whereis bash
# whereis python
# whereis perl
# whereis php



[root@server1 blog]# vim php.php
[root@server1 blog]# cat php.php
<?php

echo "From PHP !";

?>




[root@server1 blog]# vim py.py
[root@server1 blog]# cat py.py

#!/usr/bin/python2.7

print("From Python !");


[root@server1 blog]# vim shell.sh
[root@server1 blog]# cat shell.sh
#!/usr/bin/bash

print("From shell script !");


[root@server1 blog]# vim perl.pl
[root@server1 blog]# cat perl.pl
#!/usr/bin/perl

print("From Perl !");


[root@server1 blog]# ./script.sh
Please enter language: php
From PHP !



[root@server1 blog]# ./script.sh
Please enter language: py
From Python !
[root@server1 blog]# ./script.sh
Please enter language: pl
From Perl !
[root@server1 blog]# vim shell.sh
[root@server1 blog]# cat shell.sh
#!/usr/bin/bash

echo "From shell script !";


[root@server1 blog]# ./script.sh
Please enter language: sh
From shell script !
[root@server1 blog]# cat script.sh
#!/usr/bin/bash
# using the case command
#

read -p "Please enter language: " lang

case $lang in
    py | python | Python)
        /usr/bin/python2.7 py.py;;
    shell | sh)
        /usr/bin/bash shell.sh;;
    perl | pl)
        /usr/bin/perl perl.pl;;
    php)
        /usr/bin/php php.php;;
    *)
        echo "sh, php, py or pl only, you entered "$lang ;;
esac

# whereis bash
# whereis python
# whereis perl
# whereis php

[root@server1 blog]#