用 Bash 写的脚本也可以进行调试,和 Python,Perl 等解释型语言一样。新建一个名为 servinfo 的脚本并增加可执行权限:
$ vi servinfo#!/bin/bash
echo "Hostname: $(hostname)" echo "Date: $(date)" echo "Kernel: $(uname -mrs)"
$ chmod +x servinfo
$ bash -x servinfo ++ hostname + echo 'Hostname: vpsee' Hostname: vpsee ++ date + echo 'Date: Thu Sep 3 19:33:48 SAST 2009' Date: Thu Sep 3 19:33:48 SAST 2009 ++ uname -mrs + echo 'Kernel: Linux 2.6.18-128.4.1.el5 i686' Kernel: Linux 2.6.18-128.4.1.el5 i686
export PS4='+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}: '
$ bash -x servinfo + export 'PS4=+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}: ' + PS4='+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}: ' ++4:5:: hostname +4:5:: echo 'Hostname: vpsee' Hostname: vpsee ++4:6:: date +4:6:: echo 'Date: Thu Sep 3 19:42:06 SAST 2009' Date: Thu Sep 3 19:42:06 SAST 2009 ++4:7:: uname -mrs +4:7:: echo 'Kernel: Linux 2.6.18-128.4.1.el5 i686' Kernel: Linux 2.6.18-128.4.1.el5 i686
#!/bin/bashecho "Hostname: $(hostname)" set -x echo "Date: $(date)" set +x echo "Kernel: $(uname -mrs)"
$ ./servinfo Hostname: vpsee ++ date + echo 'Date: Thu Sep 3 19:46:53 SAST 2009' Date: Thu Sep 3 19:46:53 SAST 2009 + set +x Kernel: Linux 2.6.18-128.4.1.el5 i686