Bash编写中read $variable 命令是什么意思？Bash编写中read $variable 命令是什么意思？read $variable 是...
一、Linux操作系统版本 二、背景:在项目中当我们配置好JDK环境变量、Tomcat环境变量,通过source /etc/profile使环境变量生效时,发现会报错,如图 三、解决 个人尚不知出现原因,只知道注释掉下面这两行后即可使环境生效 #exportTMOUT=600#readonlyTMOUT
You can assign data to a variable using the equals sign (=). The data you store in a variable can either be a string or a number. Let’s create a variable now on the command line: chapter_number=5 The variable name is on the left hand side of the equals sign, and the data whic...
这是我的代码: #! /bin/bash read word if (( $word = "y" || $word = "Y" )) then echo "YES" elif (( $word = "n" || $word = "N" )) then echo "NO" fi 我得到这个错误: Solution.sh: line 5: ((: y = y || y = Y : attempted assignment to non-variable (error t...
今天在做一个项目的时候,需要设置ssh自动断开,于是vi /etc/profile,修改timeout的默认值,保存并退出,进行source,无果,然后百度。 给出答案,注释下面几行: #TMOUT=300 #readonly TMOUT #export TMOUT 然后source /etc/profile,还是不生效。 再次百度,无解?
保存/下载 指定URL的网页 on FileSystem/Disk 如果要把这个网页保存下来,可以使用-o参数(output),这就相当于使用wget命令了。 不带文件路径值时,默认下载到当前窗口所在的本地路径。 root#curl -o [Dir/文件名] www.sina.com 若想显示下载进度条,带上参数-# ...
One of the handiest things about environment variables is that they are a standard part of the UNIX process model, which means that once an environment variable is set, it can be read by any subsequent process we run. Let’s try this and set an environment variable called $name with ...
variable assignments, etc. */REDIRECT*redirects;/* Redirections to perform. */}SIMPLE_COM; while命令结构: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* WHILE command. */typedef struct while_com{int flags;/* See description of CMD flags. */COMMAND*test;/* Thing to test. */COMMAND...
-bash: TMOUT: readonly variable 解决办法:修改/etc/profile配置文件,将 export TMOUT=600 readonly TMOUT 这两行注释掉 export TMOUT=600 :是用户在指定秒数内没有活动(操作)时间 readonly TMOUT: 是防止用户在命令行执行TMOUT=0操作 重新加载配置文件就不会出现此报错了 ...
You can check the functions set for each by echoing its contents. echo${preexec_functions[@]}echo${precmd_functions[@]} Subshells bash-preexec does not support invoking preexec() for subshells by default. It must be enabled by setting__bp_enable_subshells. ...