多亏了docker容器中的Bash脚本才能执行命令 Docker容器是一种轻量级的虚拟化技术,可以将应用程序及其依赖项打包成一个独立的容器,实现跨平台、快速部署和可移植性。Bash脚本是一种在Linux和Unix系统中常用的脚本语言,用于编写命令行操作的自动化脚本。 通过使用Docker容器中的Bash脚本,我们可以实现以下功能: 执行命令:Ba...
Filesystem Hierarchy standard: /binEssential user command binaries,所有用户的基本命令文件存放路径 /sbinSystem binaries,系统管理二进制程序存放路径 /bootStatic file of the boot loader,系统引导加载器必须用到的各静态文件,如:kerenl,initrd,initramfs /devdevice file ,特殊文件及设备文件 /etcHost-specific sy...
file_data="$(<"file")" 将文件读取到数组(按行) 替代cat命令。 # Bash <4 IFS=$'\n' read -d "" -ra file_data < "file" # Bash 4+ mapfile -t file_data < "file" 获取文件的前N行 替代head命令。 CAVEAT:需要bash4+ 示例功能: head() { # Usage: head "n" "file" mapfile -tn...
ls: cannot access adfadf: No such file ordirectory [root@localhost ~]#echo $? 2 [root@localhost ~]# 命令正常执行时,有的还会有命令返回值,根据命令及其功能不同,结果各不相同。 引用命令的执行结果: $(COMMAND)或`COMMAND` //``是反引号 举例:要创建一个以创建时间为名称的目录: 命令引用是非常重...
# PID of last background task $$ # PID of shell $0 # Filename of the shell script $_ # Last argument of the previous command 检查命令返回值 if ping -c 1 google.com; then echo "It appears you have a working internet connection" fi 检查grep 的返回值 if grep -q 'foo' ~/.bash_...
Bash's exit status is the exit status of the last command executed in the script. If no commands are executed, the exit status is 0. An attempt is first made to open the file in the current directory, and, if no file is found, then the shell searches the directories in PATH for ...
sudo apt purge bash-snippets # you can also use remove instead of purge homebrew (macOS) / linuxbrew (Linux) brew uninstall bash-snippets Git Uninstall git clone https://github.com/alexanderepstein/Bash-Snippets # If you don't have the Bash-Snippets folder anymore clone the repository...
If no COMMAND is specified the WGET_ASKPASS or the SSH_ASKPASS environment variable is used. --no-iri turn off IRI support --local-encoding=ENC use ENC as the local encoding for IRIs --remote-encoding=ENC use ENC as the default remote encoding --unlink remove file before clobber --keep...
remove_array_dups() { # Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n' "${!tmp_array[@]}" }示例用法:$ remove_array_dups 1 1 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5...
# 设置别名aliasname='command [option] [argument]'# 取消指定的别名设置unaliasname# 列出设置的别名alias# 转义别名aliasrm='rm -i'\rm# 转义别名而使用原始的命令[root@localhost ~]# rm tmp.txtrm: remove regularfile`tmp.txt'? n[root@localhost ~]# \rm tmp.txt # \rm,使用 \ 对别名进行转义...