Expands to the name of the shell or shell script. This is set at shell initialization. If bash is invoked with a file of commands, $0 is set to the name of that file. If bash is started with the -c option, then $0 is set to the first argument after the string to be executed, ...
我想使用Bash脚本作为另一个应用程序的启动器。我想把工作目录改为Bash脚本所在的目录,以便我可以对该目录下的文件进行操作,像这样: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 $ ./application 答: 咱们容易想到的方法是使用 dirname "$0"。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #!
command &>filename 重定向command的标准输出(stdout)和标准错误(stderr)到文件filename中; command >&2 把command的标准输出(stdout)重定向到标准错误(stderr)中; scriptname >>filename 把scriptname的输出(同>)追加到文件filenmae中,如果文件不存在则创建。 [i]<>filename 打开filename这个文件用来读或者写,...
Bash: get absolute path to current script Bash shell path relative to current script Bash: while loop - break - continue Functions in Linux shell (bash) Create temporary directory on Linux with Bash using mktemp Count number of lines in a file and divide it by number of seconds in...
alias name = '/path/to/script' alias name = '/path/to/script.pl arg1' 举个例子,输入下面命令并回车就会为常用的clear(清除屏幕)命令创建一个别名c: alias c = 'clear' 然后输入字母c而不是clear后回车就会清除屏幕了: c 如何临时性地禁用 bash 别名 ...
whereis[-bmsu] filename... 常用选项: -bSearch only for binaries.只显示二进制文件 -mSearch only formanual sections.只显示man手册页 注意:我们可以应用whereis命令来判断某个命令是否有man手册页。 演示: [root@localhost ~]# whereis ls ls:/bin/ls/usr/share/man/man1p/ls.1p.gz/usr/share/man...
Example 1: Print the Current Value of the $PATH Variable Create a Bash file with the following script that prints the current value of the $PATH variable using the “echo” and “printf” command: #!/bin/bash printf"The current value of the PATH variable:\n" ...
This sets it for login shell # Current threshold for system reserved uid/gids is 200 # You could check uidgid reservation validity in # /usr/share/doc/setup-*/uidgid file if [ $UID -gt 199 ] && [ "`id -gn`" = "`id -un`" ]; then umask 002 else umask 022 fi for i in /...
Simply type the CD directory name and then click enter. You can print your directory to check this new path. The working directory can be changed to the existing one, and the current working directory will be updated, as shown in the example below. Here, we have reached the home directory...
例 如,下列命令添加了一個按鍵序列,用以引用 bash 中當前的詞或前一個詞 $if Bash # Quote the current or previous word "\C-xq": "\eb\"\ef\"" $endif $endif 上例中的這個命令,結束了一個 $if 命令。 $else 如果測試失敗,$if 指令中這個分支的命令將被執行。 $include 這個指令使用單個檔名...