Problems with garbled shell script editing

File command to view the properties of *.sh ASCII text with the CRLF line terminators

The line end flags for Linux and Windows text files are different. In Linux, the text file uses "/n" for carriage return, while Windows uses "/r/n" to indicate carriage return line breaks. Sometimes you need to be aware of this when writing shell scripts in Windows, otherwise the shell script will report "No such file or directory" or "command not found line X" error, if you do not know the cause and consequences, Will surely be quite depressed by this toss. As shown below test.sh

. /home/oracle/.bash_profile

Echo '

Date

Echo '

Sqlplus test/test @/home/oracle/scripts/test.sql

Echo '

Date

Echo '

"No such file or directory/home/oracle/.bash_profile" and "Command not found line xx" are reported during test.sh script execution. If you check the syntax of the shell script, there is no problem at all. I'm sure it's pretty depressing to know for certain reasons.

[Oracle@db-server myscript]$./test.sh

: No such file or Directory/home/oracle/.bash_profile

: Command not found Line 2:

: Command not found line 4:date

: Command not found line 6:

: Command not found line 7:

If you use the file command to view the test.sh, you will find the files encoded as Ascii,with CRLF line Terminators. We can see ^m with cat-v test.sh (\ r's hex is 0 d and the corresponding control is ^m). Cat-v can see non-printable characters in the file.

Test.sh:ASCII text, with CRLF line terminators

. /home/oracle/.bash_profile^m

Echo ' ^m

Date^m

Echo ' ^m

^m

Sqlplus test/test @/home/oracle/scripts/test.sql^m

^m

Echo ' ^m

Date^m

Echo ' ^m

[Root@db-server myscript]#

VI command to view the test.sh file can not see ^m, in fact, this is related to the version of VI. Some version vi shows that the end of the line is ^m (Aix is displayed under ^m). Some vi open can see the "DOS" in the bottom of the format hint.

We can compare the format and encoding of the normal shell script with the file command. As shown below

[Oracle@db-server myscript]$ file myshell.sh

Myshell.sh:bourne-again Shell Script Text executable

There are many ways to solve this problem, such as writing shell scripts directly using the VI editor, creating shell scripts with the cat command, and copying scripts from the Windows Text tool. The most convenient thing is to use Dos2unix to convert the DOS format text file to UNIX format or to the Linux format.