^foo^bar Run the previous command replacing foo with bar
So we want to prepend sudo to the previous command. Of course, we can press Ctrl-p to recall the last command, move the cursor to the right position, and type sudo. Well, “sudo” is short, and moving the cursor (pressing Ctrl-a) to the very beginning isn’t hard to do. However...
还有,这种表示方法不是Bash内建的,要达到此点的这种效果,需要看你使用的软件是否支持这种操作; \3. 表示先前的工作目录(previous working directory),因此,如果你cd到其他目录下要放回前一个路径的时候,可以使用cd -来达到目的,其实,这里的[-]使用的是环境变量的$OLDPWD,注意:这里的[-]和前一点是不同的; \4...
Occasionally you might want to run a command like you would on the command line and store the result of that command in a variable. We can do this by wrapping the command in a dollar sign and parentheses ($( )) around a command. This syntax is calledcommand substitution. The command is...
When bash is started non-interactively, to run a shell script, for example, it looks for the variable BASH_ENV in the environment, expands its value if it appears there, and uses the expanded value as the name of a file to read and execute. Bash behaves as if the following command ...
Recalling previous commands Try entering this command that has a typo (203? instead of 202?): Bash Copy ls -a .azure/commands/203?*.log You should see this output letting you know that there weren't any files that matched that pattern: Output Copy ls: cannot access '.azure/commands...
$ curl -fSsL "https://raw.githubusercontent.com/imomaliev/tmux-bash-completion/master/completions/tmux" > "${dir?error: dir not set: you must run the previous commands first}/tmux" Reload your configuration files $ source ~/.bashrc Without bash-completion You can simply download the compl...
If n is not supplied, then it will return the exit code of the last command run. Though, the possible value range for the return builtin is limited to the least significant 8 bits which are 0 to 255. Any number above 255 will just return a zero value. If a non-number is used, ...
Sudo for Windows is a new way for users to run elevated commands directly from an unelevated console session. It is an ergonomic and familiar solution for users who want to elevate a command without having to first open... Oct 18, 2022 ...
#!/usr/bin/env bash # Filename: ./example-xtrace echo "This got executed" v=$1 if [[ -z "${v}" ]]; then echo "\$v is empty" fi ## Debug Output [me@linux ~]$ TRACE=1 BASH_ENV=my-debug-env ./example-xtrace param1 Run TRACE mode [ DEBUG ]| BASH_COMMAND=echo "This...