1. bash builtin commands(fedora38-GNU Bash 5.2) BASH_BUILTINS(1) General Commands Manual BASH_BUILTINS(1)23NAME4:, ., [, alias, bg, bind, break, builtin, caller, cd, command, compgen, complete, compopt, continue, declare, dirs, disown,echo,5enable, eval, exec, exit, export,false...
The commands introduced inthis chapter are: 砖业洋__ 2023/05/06 2300 Linux 命令(144)—— eval 命令(builtin) shell编程算法 eval 会对后面的命令进行两遍扫描。如果第一遍扫描后,命令是个普通命令,则执行此命令;如果命令中含有变量的间接引用,则保证间接引用的语义。也就是说,eval 命令将会首先扫描命令...
格式为:trap “commands” EXIT。如脚本exit.sh: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 !/bin/bash echo "start" trap "echo 'end'" EXIT echo "before exit" exit 0 执行exit.sh输出: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 start before exit end 参考文献 [1]exit manual...
Displays brief summaries of builtin commands. If PATTERNisspecified, gives detailed help on all commands matching PATTERN, otherwise the list of help topicsisprinted. Options:-d outputshortdescriptionforeach topic-m display usageinpseudo-manpage format-s output only ashortusage synopsisforeach topic ...
Note: Only built-in commands can be used with the help command. The help command only works with the bash shell. Another useful utility for getting help on the command-line is the help command. Use it to get a brief description of a specific built-in command. ...
Enter 'help' for a list of built-in commands.系统就在这个地方卡住了，但是如果我在initramfs下面输入 exit 系统就可以在一些提示下面正常启动，一切正常。可以通过延长时间 timeout=90 来解决这个问题。具体解决方法如下 在boot\grub\下找到menu.lst文件。 修改文件下内容 kernel /boot/vmlinuz-2.6...
bltin - Runs the internal command in the shell. break - Exits from a for, foreach, while, select or until loop. builtin - Forces the use of a shell that builtin commands. builtins - Shows all built-in commands in tcsh. bunzip2 - Decompresses bzip2 files. burst - Allows a message...
退出shell，输入“exit”，并检测硬盘“fsck /dev/mapper/ubuntu--vg-root -y”检查完成后，我重新启动系统。BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash)Enter 'help' for a list of built-in commands.(initramfs) reboot 具体可以看看这个网页链接 ...
关于alias 和它的反命令unalias的更多信息,请查看 BASH 的man页面的 "SHELL BUILTIN COMMANDS" 子部分。在最后一个例子中,定义了一个环境变量来实现相同的结果。 $ export JDEV_HOME=/jdev9i/jdev/bin/jdev $ echo $JDEV_HOME /jdev9i/jdev/bin/jdev ...
Enter 'help' for a list of built-in commands. (initramfs) 造成上述问题的原因包括但不限于: 实例被强制关机或重启。 突然宕机导致文件系统数据不一致。 卸载了数据盘但未从/etc/fstab中删除相应的挂载信息。 /etc/fstab文件丢失或损坏。 initrd文件被损坏。