Use the if-else statement with the -v option to check if an environment variable is set in bash. The echo command in the if block will be executed if the will
setsessionId加入组网和on启动监听前后设置的区别 @ohos.data.preferences在App退出重启后,持久化数据丢失 非UI页面使用用户首选项时如何获取context 如何实现同步方式调用数据库接口? 首选项错误码:code:"401” err: Error: Parameter error. The type of 'value' must be ValueType. 如何排查问题 如何查看...
#!/usr/bin/env bash # Check if variable is true: if is_boolean_yes "${ENABLE_SOMETHING}"; then echo "Yay, something's enabled!" else echo "Something's disabled, boo! :(" fi # Check if variable is false: if ! is_boolean_yes "${ENABLE_SOMETHING}"; then echo "Haha, it's dis...
Here, instead of using any regex operator or thegreptool itself, I do an exact match for every element of an array. I also use a "flag" variable (matched) to check if the match actually occured or not. 💡 I can embed the if-condition in the loop itself, but that would only be ...
标签:bash,conditions,if...then...else..fi,Linux,shell script,profile,/etc/profile 好文要顶关注我收藏该文微信分享 xgqfrms 粉丝-43关注 -0 +加关注 0 «How to print a string with a variable by using the echo command in the shell script All In One ...
After looking at the code, I've found that this error came from the following condition, which check if my login shell is bash (which is not). # Check for BASH Shell if [[ -z $(grep -E "^${SUDO_USER:-${USER}}\:.*\/bash.*$" /etc/passwd) ]]; then echo "$(tput setaf...
You need to access the image by using the virtual private cloud (VPC) endpoint of the image repository to which the image is uploaded. Example: registry-vpc.cn-shanghai.aliyuncs.com/xxx/yyy:zzz. env name The name of the environment variable that is used to launch a container based on ...
Note: MATLAB may still read the LM_LICENSE_FILE variable if it is set, before it reads MLM_LICENSE_FILE. One of these variables must be set for clients of a redundant server triad to function properly. How you find or set these environment variab...
find_program(Patch_EXECUTABLE patch PATHS $ENV{MS_PATCH_PATH}) set(Patch_FOUND${Patch_EXECUTABLE}) else() find_package(Patch) endif() if(NOT Patch_FOUND) message(FATAL_ERROR"Patch not found, " "please set environment variable MS_PATCH_PATH to path where Patch is located, " ...
package/bash/0002-parse.y-fix-compilation-for-non-multibyte-builds.patch Upstream package/bash/0003-configure-invert-condition-for-strtoimax-builtin.patch Upstream package/bayer2rgb-neon/0001-add-some-_always_inline_-annotations.patch Upstream package/bc/0001-bc-use-MAKEINFO-variable-for-docs....