Linux exit file test test conditions

Exit 1 to end execution in the middle of the script

Cases:

[email protected] script]# cat usertest.sh
#!/bin/bash
#
Testuser=hbase
if! grep "^ $TESTUSER"/etc/passwd &>/dev/null; Then
echo "Not find User: $TESTUSER"
Exit 1
Fi
Useruid= ' grep ' ^ $TESTUSER "/etc/passwd | cut-d:-f3 '
Usergroupid= ' grep ' ^ $TESTUSER "/etc/passwd | cut-d:-f4 '
If [$USERUID-eq $USERGROUPID]; Then
echo "Good guy!"
Else
echo "Bed guy"
Fi
[Email protected] script]#

The first half of this script will execute exit 1 if the user is unable to find it. 0 The return value is executed for the correct state, and 1-255 is an error here, either one is OK. The rest does not explain hehe.

Common Test conditions for bash

Integer test

-GT Greater than

-lt less than

-ge greater than or equal to

-le less than or equal to

-ne Not equal to

-eq equals

Test mode 1. [Expression] 2. [[Expression]] 3. Test expression

The first two most commonly used

File test

-e file Test files exist

-F file Test files are normal files (non-linked files, device files, pipeline files)

-D path Tests whether the specified path is a directory

-R file tests whether the current user has read access to the specified file

-W file tests whether the current user has write access to the specified file

-X file tests whether the current user has execute permissions on the specified file

Cases:

[-e/etc/inittab] means testing whether the/etc/inittab file exists.

Linux exit file test test conditions