切换文件不可变 、 我想做一个简单的bash脚本来切换一些文件(特别是我的桌面图标,这样它们就不会在不应该移动的时候移动)sudo chattr +i ~/.config/xfce4/desktop/icons*答案可能与“lsattr”和“grep”有关,但我不确定它们应该采用哪种形式…… (如果答案可以是if语句的形式,那就太好了:D ) 浏览0提问于2012...
if 语句行使用 grep 命令在/etc/passwd文件中查找某个用户名当前是否在系统上使用。如果有用户使用了那个登录名,脚本会显示一些文本信息并列出该用户HOME目录的bash文件。 [root@jerry sh]# sh ceshi:x:501:501::/home/ceshi:/bin/bash This is my first command This is my second command I can ecen p...
use the grep function to check given element exists or not with the required regular expression. It returns true if a number scalar is found. else return false. To summarize, I Demonstrated multiple ways to check given element contains an array. based on the Perl version, You can choose ...
python3--变量，布尔值，用户交互 input，if语句，while循环以下排序从最优到最差： system：表内只有...
If the conditional expression is true, it executes the statement1 and 2. If the conditional expression returns zero, it jumps to else part, and executes the statement3 and 4. After the execution of if/else part, execution resume with the consequent statements. ...
To evaluate the expressions, use the expr command, which executes the given expression and returns the result. Expect expressions are similar to the C expressions. Some of the valid expressions are listed below. # To add two simple numerical values ...
If given key exists in the dictionary, then it returns the value associated with this key, If given key does not exists in dictionary, then it returns the passed default value argument. If given key does not exists in dictionary and Default value is also not provided, then it returns None...
By omitting the/dev/sdaparameter,we can expand the output oflsblkto include all disks. Thenwe can usegrepto filter the output oflsblkto show only encrypted partitions: $ lsblk -o NAME,KNAME,FSTYPE,TYPE,MOUNTPOINT,SIZE | grep crypt └─sda4 sda4 crypto_LUKS part 236,3G └─sda4_crypt...
impl OverwriteArgs { /// Returns true if none rule is turned off on CLI nor filtered out pub fn include_all_rules(&self) -> bool { self.filter.is_none() && self.off.is_none() } } #[cfg(test)] mod test { use super::*;34...
grep "stale info" err ) && git ls-remote dst refs/heads/master >actual.master && test_cmp expect.master actual.master ' test_expect_success '"--force-if-includes" should allow forced update after a rebase ("pull --rebase")' ' setup_src_dup_dst && test_when_finished "rm -fr dst ...