> date > test bash: test: cannot overwrite existing file 设置不解析通配符: > set -f # 等价于 set -o noglob > touch * > ll * -rw-rw-r-- 1 remilia remilia 0 Mar 1 20:09 '*' 到此这篇关于详解bash中的脚本调试机制的文章就介绍到这了,更多相关bash
/>date>outfile#通过date命令先生成一个文件outfile。/>ls>outfile#将ls命令的输出重定向到该文件outfile,shell将提示不能覆盖已经存在的文件。-bash:outfile:cannot overwrite existing file/>set+o noclobber#关闭noclobber选项。/>ls>outfile#重新将ls的输出重定向到outfile,成功。 2. 变量: 设置局部变量: /> na...
set: usage:set[--abefhkmnptuvxBCHP][-o option-name][arg...][root@Node3 src]# set -C[root@Node3 src]# echo "ddd" 2> test-bash: test: cannot overwrite existingfile[root@Node3 src]# echo "ddd" > test-bash: test: cannot overwrite existingfile[root@Node3 src]# set +C[root@N...
合并标准输出和标准错误的重定向: COMMAND {>|>>} /PATH/TO/SOMEFILE 2>&1 [root@localhost~]# ls a.txt &> b.txt[root@localhost~]# cat b.txta.txt[root@localhost~]# rm -rf a.txt[root@localhost~]# ls a.txt &> b.txt-bash: b.txt:cannot overwrite existingfile[root@localhost~]# l...
file1,当ls /data/test/命令运行成功时,只执行ch /data/test/file1命令 [root@xuzhichao ~]# rm -rf /data/test/ [root@xuzhichao ~]# ls /data/test/ || mkdir /data/test/ && touch /data/test/file1 ls: cannot access /data/test/: No such file or directory [root@xuzhichao ~]# ls ...
ll>a.txt可以写入ll>a.txt可以覆盖[root@localhost110 bin]#set-onoclobber[root@localhost110 bin]#ll>a.txt-bash:a.txt:cannotoverwriteexistingfile[root@localhost110 bin]#ll>>a.txt[root@localhost110 bin]#set+onoclobber[root@localhost110 bin]#ll>a.txt ...
...: set -o noclobber echo "this is a line" > file.txt bash: file.txt: cannot overwrite existing file...>|运算符可让您覆盖Bash的“ noclobber”选项: set -o noclobber echo "this is a line" >| file.txt >>运算符将输出追加到文件末尾,而不是覆盖文件...使用tee命令写入文件 tee命令从...
If set, bash does not overwrite an existing file with the >, >&, and <> redirection operators. This variable may be overridden when creating output files by using the redirection operator >| instead of > (see also the -C option to the set builtin command). auto_resume This variable ...
否则,您将收到拒绝权限错误。...: set -o noclobber echo "this is a line" > file.txt bash: file.txt: cannot overwrite existing file...>|运算符可让您覆盖Bash的“ noclobber”选项: set -o noclobber echo "this is a line" >| file.txt >>运算符将输出追加到文件末尾,而不是覆盖文件 2.2K...
internal_error (_("%s: cannot overwrite existing file"), filename); break; #if defined (RESTRICTED_SHELL) case RESTRICTED_REDIRECT: internal_error (_("%s: restricted: cannot redirect output"), filename); break; #endif /* RESTRICTED_SHELL */ case HEREDOC_REDIRECT: ...