Bash Script – Check If File is Empty or Not With the -s Option touch/tmp/f1echo"data">/tmp/f2ls-l /tmp/f{1,2} [ -s /tmp/f1 ]echo$?# output is 1[ -s /tmp/f2 ]echo$?# out put is 0# -s FILE FILE exists and has a size greater than zerohttps://www.computerhope.com...
] Check and repair a Linux filesystem. Options: -A check all filesystems -C [<fd>] display progress bar; file descriptor is for GUIs -l lock the device to guarantee exclusive access -M do not check mounted filesystems -N do not execute, just show what would be done -P check file...
-z is the second supported bash string comparison operator used to check if a string is empty or not. The -z operator functions similarly like -n operator. Below is an example: Most importantly, you should add spaces around the square brackets. If there are no spaces, bash will complain ...
txt File: '1.txt' Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: 803h/2051d Inode: 16797813 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Context: unconfined_u:object_r:admin_home_t:s0 Access: 2019-03-20 07:51:03.772158277 +0800 ...
if[!-s ${REMOTE_FILE}]then SH_error_msg"${REMOTE_FILE} file is empty"return1fi 循环 For for循环的一般格式为: 代码语言:javascript 复制 for变量in列表docommand1 command2...commandN done 列表 是一组值(数字,字符串等)组成的序列,每个值通过空格分隔。每循环一次,就将列表中的下一个赋给变量。
if(!IS_ERR(dup)){/* Check if we already have the same exact entry */conststructnft_data*dup_key,*dup_end;dup_key=nft_set_ext_key(&dup->ext);if(nft_set_ext_exists(&dup->ext,NFT_SET_EXT_KEY_END))dup_end=nft_set_ext_key_end(&dup->ext);elsedup_end=dup_key;if(!memcmp(...
linux_check_evt_arm - Checks the Exception Vector Table to look for syscall table hooking linux_check_fop - Check file operation structures for rootkit modifications linux_check_idt - Checks if the IDT has been altered linux_check_inline_kernel - Check for inline kernel hooks ...
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Query the file system mounting information. mount|grepMount point In this example, run the following command: mount|grep/mnt/sdc If information similar to the following is displayed, automatic mounting has been configured: root@ecs-test-0001 ~]# mount | grep /mnt/sdc /dev/vdb1 on /mnt/sdc...
if [ ! -s ${file} ] then rm ${file} echo "rm $file success!" fi done 0008 redhat设置滚轮鼠标(mc1011) 进入x后,选择鼠标的配置,选择wheel mouse(ps/2)就可以耍? 如果鼠标表现异常,重启计算机即可。 0009 加装xwindow 用linux光盘启动,选择升级,然后单独选择包,安装即可 ...