"local" can only be used in a function in Bash. It will causes an execution error. Here is a simple example. #!/bin/bash local word="hi" echo $word exit 0 line 3: local: can only be used in a function May shellcheck check for this error?
Bash provides a bit more flexibility where any compound command can be used for a function definition. The syntax of a POSIX shell function is fn_name () compound-command [ redirections ], and an alternative syntax in bash is function fn_name [()] compound-command [ redirections ]....
Bash - Alias (of a command) - Builtin command Alias allows to define shortcuts and synonyms for commonly used: shell commands (of group of command) or script They allow a string to be substituted for a word when it is used as the first word... Bash - Caller - Stack Trace (Built...
noredinall other cases. The -Ioptioncauses local variablestoinherit the attributes (except the nameref attribute)andvalueofany existing variablewiththe same name at a surrounding scope.Ifthereisno existing variable, the local variableisinitially unset. The following options can be usedtorestrict outpu...
lsblk硬件查看命令 批处理一键关闭危险端口 Linux下ntpdate时间同步命令出现the NTP socket is in use, exiting nginx: [warn] the “log_format” directive may be used only on “http” level in Linux使用.htaccess根据IP地址限制访问 Apache+PHP安全设置 Serv-U安全设置 Windows Server 2008服务器安全加固 ...
How to remove a key from a Bash Array or delete the full array? (delete) The unset bash builtin command is used to unset (delete or remove) any values and attributes from a shell variable or function. This means that you can simply use it to delete a Bash array in full or only re...
-ne 不等于,如:if [ "a"−ne"b" ] -gt 大于,如:if [ "a"−gt"b" ] -ge 大于等于,如:if [ "a"−ge"b" ] -lt 小于,如:if [ "a"−lt"b" ] -le 小于等于,如:if [ "a"−le"b" ] < 小于(需要双括号),如:(("a"<"b")) ...
When invoked as an interactive login shell, or a non-inter- active shell with the --login option, it first attempts to read and execute commands from /etc/profile and ~/.profile, in that order. The --noprofile option may be used to inhibit this behavior. When invoked as an interactive...
ShellCheck can recognize instances where commands are used incorrectly: grep'*foo*'file# Globs in regex contextsfind . -execfoo {} && bar {} \;# Prematurely terminated find -execsudoecho'Var=42'> /etc/profile# Redirecting sudotime --format=%s sleep 10# Passing time(1) flags to time bui...
'${XDG_DATA_HOME}/fff/trash'#If not using XDG, '${HOME}/.local/share/fff/trash' is used.exportFFF_TRASH=~/.local/share/fff/trash#Trash Command#Default: 'mv'#Define a custom program to use to trash files.#The program will be passed the list of selected files#and directories.export...